McKee is one the better known screen-writing gurus. (Others include Syd Field, Linda Seger, Blake Snyder, and my favorite Gene Vail.) He considers screenplays literature.
I suppose the best of them have a spare beauty reminiscent of a haiku. It has to be spare since a reading (as opposed to a shooting) script contains ONLY dialog and very brief scene and action description. I try for beauty as well as expressiveness, but then I began writing with poetry.
INT. STARSHIP - DAY
The planet Saturn hangs luminous in the starship viewscreen. Its rings are seen near edge on. Green Chinese-like script scrolls downward to one side of the 'screen.
(V.O. The speech is obviously mechanical but oddly sweet and expressive.)
WONDER WOMAN's beautiful face is seen close up. She open's the penetrating grey eyes of an Athena. Centuries of experience look out. She has seen empires rise and fall. Saved and killed millions. And raised twins.
(V.O. Her lips do not move. She is speaking over a neural interface.)
Understood. You have performed efficiently. Will launch in ... 37 seconds.
The standard READING (or spec) script format can be found at the Oscar organization site.