Ah, but the believe that gods are beyond science is a sacred cow - exactly what we are taking aim at. So a story could explore scientific breakthroughs such as contacting people after death or actually contacting beings that were thought of as gods in the past. Time travel, as another example could disprove or prove many religious miracles.
No, it's not a sacred cow philosophy that gods are beyond science; it's the definition of the term "god." A god is a supernatural entity beyond the laws of nature. If something you are calling a god turns out not to be a god -- turns out not to be divine supernatural and magic is real, but instead say an alien and magic and divinity are not involved, then it is no longer a god. It's just science. So you can't use science to prove that gods are real because gods exist outside of science. If you can prove they are real with science, then it's not a god. That's how we use language.

It doesn't matter if it's Jehovah or Zeus.
There have been quite a lot of SF stories about contacting dead people and gods turning out not to be gods, but instead alien life forms or electromagnetic fields or something like that. In fact, Doctor Who makes a point of it on a regular basis. But then they're not really gods -- that's the SF reveal. So I don't know that's a sacred cow of SF. (An interesting one on the death thing is Connie Willis' novel Passage.)
Edward said:
Uh, no, it's not. In fact, it's so legally well-established that it's not that I'm not sure where you even got that idea from.
I got it from history when they drafted the Constitution. The states demanded the 2nd amendment so that they could keep/have state militias because there was concern that the federal government would insist on a federal army only and they wanted their own armies. That's why it's well regulated militias. And from numerous Constitutional scholars who've explained it. When a sheriff drafted or got volunteers for a posse, he was able to do so because of the 2nd amendment -- he could draft citizens to serve as armed members of a well-regulated militia (the posse.)
Now, it's become a larger legal debate whether the 2nd amendment definitely has the broader mandate to protect citizens' rights to own guns as well as bear them in a militia. (I.e. citizens could serve in the well regulated militia even if they didn't own guns themselves -- they could be given them. The idea was they had the right to use the guns as part of the well regulated militia. They couldn't be banned from serving in the state militaries.) But that debate has been relatively recent to a degree:
http://www.newyorker.com/news/daily-comment/so-you-think-you-know-the-second-amendment The Supreme Court has backed up the wider mandate only a few years ago, but that doesn't mean that guns cannot be regulated, because there's that well-regulated part of the amendment. The idea that the government is coming to take the guns away from citizens is relatively recent and occurred basically mainly when Clinton was elected.
Something like a gun that can shoot itself would pose a number of conflicts, again, for people in the States. Because the gun issue is not simply about having guns on hand in case you need them. It's about shooting them. It's the image of the gunslinger of the movie version of the Old West. A gun that doesn't need you and you don't get to always control would be of much less interest to a segment of folks than something that could cause a lot of destruction. A gun that could fire against a detected threat would however be of interest to other folks. Law enforcement would certainly have a lot of splits over it, as they increasingly get more military and tech advanced equipment but also have to contend with folks whose guns would go off and kill innocent people.
Two or three kids die each week in the States from gun accidents already. Then there's the two year old who pulled a gun from mom's purse while in the grocery cart and shot and killed her with it accidentally and the kid who shot both his dad and his pregnant mother. So what if a kid gets ahold on a smart gun, turns on its computer, and that computer decides the nearby parent is a threat and shoots? So it would be a very tricky technology for the U.S., embraced and feared by different groups.
the commonplace tools of the not-too-distant future will make the whole thing seem quaint. No, you can't have a .22, but you can have a spaceship that throws nuclear bombs out the back for propulsion...
I don't think we're ever going to make a spaceship as cheap as a car. But of course, the Jetsons may end up being very prophetic. We don't know where we're going with the new tools, which has been a long time SF interest. That includes the Singularity, which is about tech outstripping our current understanding, and much of related cyberpunk SF.
I haven't read that one, but I wouldn't really class most post-apocalyptic stories as SF.
It depends on whether they have fantastic elements in them or not. If they have magic, they're fantasy. But most post-apocalyptics are SF -- no magic, just various degrees of lost tech or tech existing but a very different social structure. They are a long time part of SF, and they are SF, just like time travel stories and alien contact stories and space pirates. They are part of the body of SF literature. They do not belong to the body of fantasy literature. Fantasy fiction does not mean SF stories you don't like. It is an actual, specific term.
If big government goes away, big business costs increase massively, as they have to fund all that infrastructure and defence themselves. They also have to find new customers, as the government won't continue throwing taxes at them. To continue to exist, they basically have to become the government of a proprietary community,
That's the way it used to work when we had capitalism. But now we have global raider capitalism, which isn't the same thing. Corporations are massive global entities with little allegiance to any country. They don't have to be in a symbiotic relationship with any government and the finance sector can crash the currency of nearly any country and make money off of doing it. They are largely for the privatization of infrastructure, energy, communications, defense, space exploration, schools, etc., and they prefer desperate, impoverished labor forces (serfs) but since they are global and can move their interests, there's no need to really provide government services for that labor force. And because executives and major shareholders are invested in raider fortune building, they also frequently cannibalize themselves, with executives taking massive payouts and doing share buybacks to scoop value out of the company or acquired sub-companies rather than invest capital in the company. So that becomes an interesting set-up for future projections. That's something that Paolo Bacigalupi explored in The Wind-Up Girl, and Richard A. Morgan in a different direction in Black Man.
For the 3-D area, you might find Charlie Stross' Halting State and sequel Rule 34 interesting novels on that.