I don't think that's a bad idea, though it may be difficult to implement with some games (I'm looking at you Steam) that said, I think we may have to wait until 10.7.5 or eve 10.8 before it truly becomes available/of mainstream use.
Since Apple are iPadifying OS X, I would really like to see Game Centre hit the Mac platform.
Thats all I have to say. Feel free to post you opinions on the matter.
Hey, why is every other post of yours, claiming OS X iPadifying in the future releases?