As someone with an iOS game on the AppStore, I have to say I welcome gaming coming to the appleTV (which is basically an iPod Touch with a TV out socket).
You guys can piss on Apple, but if I wanted to sell a game for Nintendo/Sony/M$/etc that would be totally no go. But Apple has allowed me to develop a game and sell it. You could all do it too (read my blog).
I don't play games anywhere else than on my iPhone now
Why would it be a no go, especially Indie stuff on the xbox 360, whats stopping you there ?