I'm not touching graphics or the actual power of the new systems with this post, I'm thinking of minor features that the current consoles don't have.
One feature I would love to see is the PC's screenshot/video recording ability in EVERY game. Halo 3/Reach has the ability to upload screenshots to Bungie.net, as well as render multiplayer games video saves, and a few games can upload a short video to youtube. I'd like to see that game recording/screenshot feature Halo has in every game.
If anyone has ever played on Onlive and watched gameplay over the Arena, and gameclips, it's a neat feature. It's just one thing I think would make the console experience a bit more fun.
Anyone else have ideas?