I'm coming into this late, and so almost hate to bump the thread when so much has already been said that's on point about it (older games are actually easier to access, roms, copying, nostalgia value giving us an unclear idea of superiority of the past -- ie data data data that disproves the basic theory here), but it's also interesting that an opinion like this can be prevalent when there's really a rise in re-issues going on right now:
http://blog.wired.com/games/2008/07/good-old-games.html
http://en.wikipedia.org/wiki/Virtual_Console
Getting older games via download has never been that difficult -- I played Genesis roms through most of college -- but getting mainstream access to these games is now even easier.
I think games as a medium tend to be too down on themselves, and I really don't know why this is. It's a heck of a lot easier to find classic games than it is for me to get access to a Rembrandt (and experiencing paintings over the internet is not at all the same thing, so Google doesn't really mitigate this), or a myriad classic forgotten films.
To me the interesting thing is why anyone would have a perception that games have less of an appreciation of their past. Appreciation of game history has only increased in the last decade, and if it dwindled before then, it was because there wasn't that much history to be had -- it was happening in real-time. I taught a one week game design course to a crop of twelve year olds last year and it was a revelatory experience to have to explain _Joust_ to them -- but one of the kids, bless his heart, knew about the brown box. And all of them were fascinated with classic games and game history, even though their modern interests were in playing current games.
There are certainly a lot of things about the industry that need fixing, but I don't think this is one of them. Before you decide that games-as-art don't appreciate their past, you need to talk to a game artist. Most of them fully and deeply appreciate the past, as does the growing field of game history.