There are such amazing sci-fi movies out there, some of the best are on the poll, but seriously, Star Wars tops them all. It's a titan that will never die, with it's only competition being Lord of the Rings.
(Original post by Mr. Gutsy)
Actually, it is. It's a fictional story set in a dystopian, 'near-future' conception of Britain, and is largely grounded in fantasy. I can see how it could be thought of as not being sci-fi, considering its themes and representation aren't typical of conventional sci-fi depictions (or, they're just not as vivid in their representation). It isn't categorized solely as a sci-fi, but it is widely recognized as fitting within this genre (as a number of reputable sources will inform you of).
ah yeah, I guess so. I always forget that it's not set in the 'real world' ...
You should have asked, "What's your favourite sci-fi film", because that's what most people have answered. The "greatest" ought to be the greatest for everybody; a statement of fact- this would require the proposal and acceptance of criteria according to which the films could be ranked.