All great civilizations that have come and gone (Rome, Greece, Egypt etc.) have left their mark, and they still continue to be studied to this day. No doubt in the future the 20th century will be studied as the beginning of the modern Technological civilization, and everything that happened. I think that one of the most important things we'll be remembered for is the beginning of movies, films etc. Obviously they won't be able to watch all the movies from this era (just like we don't read every single book from Rome), but they will instead watch and study some key ones.
So, which movies do you think will be remembed for one reason or another 1000 years from now?
In my opinion, 2001: A Space Oddysey will be a favourite, all the Roman epics (like Spartacus, Quo Vadis and Ben Hur), some of the war movies like Apocalypse Now, Platoon...
I've just drawn a mental blank so I'll stop now, but I'll add some later on
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Black Holes Suck!
Black Holes Suck!