Oh this is a difficult one, where to draw the line between science fiction and fantasy?
However I do recall a lot of space craft, light Sabre's, ray guns, anti gravity devices, alien worlds and such in Star Wars but personally I prefer to see them all as part of one great big science fantasy fiction genre.
Take James Bond films for example, plenty of science and tech' in there and much of it pure fiction, well at least at the time anyway, but they are seen as spy adventure films which I find rather odd and then you have Terry Pratchett's other reality idea where everything exists in an alternative universe, and that is very much the point from which I take my queue.
Star Wars, Star Trek, Lord of the Rings, The Crow, Harry Potter? all very diverse but all equally unreal and all part of an imaginary existence that definitely would not happen in our world. And you have to remember that a lot of Sci-Fi is used merely as a way of telling a story in a way that circumvents our current social morays, a 'cover' as it were for subjects we would rather not face up to directly.
