The Smithsonian is looking to put together an exhibit known as "The Art of Video Games." It will feature 80 games across different genres/eras. You can vote online right now at
www.artofvideogames.org. I had a hard time choosing a few (like MM2 vs. SMB3 vs. Metroid) but it was fun to vote on some Atari 2600 and Commodore 64 games.