what I really love about
reading science fiction...( not the movie of the same name) .... is that there are no limits to creativity.
Because you can't really just say 'science fiction', and expect to encompass it's breadth.
That's not to say that there haven't been some excellent movies based on SF novels. Or novellas.
First to mind of course must be Blade Runner. Closely followed by the 2001 ;A Space Odyssey, Silent Running, Soylent Green... and Alien etc etc
The film AVATAR.... was a conglomerate of many science fiction 'genres'.
But they cannot match the written work.
They may never... because a person reads a book... a unique and individual experience.
That can't really be said of passive movie watching.
You can split science fiction onto many 'genres', as I've suggested , above.
'Science fiction' is a limiting term... er no offense Bludger.

Its not like Romance - or Thriller, or Mystery , or Horror, it includes all of that.!!
There really is nothing like a good SF read.!!