Films seem to live forever, but games are often forgotten once their console generation ends. Things like Virtual Console come close, but there's never any extras or even a guarantee that the game is playable come next console generation.
It's easier with movies because the formats live at least twice as long. Look at how long VHS was around, and DVD may match or exceed that. You can go to your local library and rent a copy of a classic film. People still watch old movies because they're so accessible.
It baffles me why we haven't seen a similar implementation for games. All of the elements are in place, but the execution hasn't been nailed yet. I want to see a company license games for definitive releases with the same extras that DVDs get, like commentaries and documentaries, and release it on a standard format that will be playable for at least 20 years. Blu-Ray seems like a good option, given the Java implementation (a BD-J NES emulator was made, and it worked on PS3 until a patch broke it).
Imagine a definitive edition of Final Fantasy I. Include every released variation of the game on one disk, with the soundtrack, art, and documentaries accessible from DVD-style menus. Include a recorded playthrough with audio commentaries.
They do it for movies, they do it for music, but not for games. Heck, even literature gets reprinted with forewords, extra articles, and new illustrations. Does this bother anyone else?