About older games and people discovering them, this is one reason why Good Old Games [http://www.gog.com/en/frontpage/] exists.
Provides older games for $10 USD and under, all optimized for current systems, and no DRM, so there's little-to-no hassle in getting them to run.
Plenty of my friends have discovered great older games this way. And GoG's existence makes me happy.
As for console games, well the Wii Store has a HUGE storefront specifically for older Nintendo games. Plus its backwords compatable with Gamecube games. Although finding those games would be a challenge.
For MS & Sony, things are a bit more sad. Microsoft scrapped bringing Xbox games to the 360 long ago. They just don't seem to care anymore. Sony has put up quite a few old PS1 games on the Playstation Network, and is giving popular PS2 games HD remakes. For those that don't have HD remakes, well the PS2 is still around, and so are a lot of its games. And if you have any PS1 games, they're compatible with the PS3. But again, finding those games would be a challenge.
Still, I wish they would care more about older games. Specifically Microsoft. There's plenty of old Xbox games that I would love to get people today to play(like Timesplitters).