From the iOS Mountain Lion info page:
"Game Center will be expanded to include Mac games, and will also allow for those games to appear on TV screens thanks to AirPlay. Startlingly, it appears that iOS games will be playable on your Mac. The point here is to make your gaming experience as seamless as possible."
Also, Mountain Lion will cost $19.99 and does not require Lion to upgrade.
$20 allows me to integrate all my phone apps to my computer and vice versa (among a ton of other things)? ABOUT DARN TIME APPLE.