OK ... Have to have my 2 cents worth ....
Gattaca from 1997:
http://en.wikipedia.org/wiki/Gattaca
Blade Runner:
http://en.wikipedia.org/wiki/Blade_Runner
These are both Classics !
Being a star Trek Fan I could not miss mentioning the Double Episode of TNG "The best of Both Worlds"
http://en.wikipedia.org/wiki/The_Bes..._Generation%29