kodeen: If this is true, this would provide the only reason so far for me to upgrade from 7.
The only issue I could see is I don't know how much freedom X360 developers have with the system. If they're allowed to use system-specific optimizations like PPC assembly, then it could be a problem. If they're forced to code against DirectX only, then should be easy.
Well, that's the thing: my first question is "How"? Surely running games developed for a platform run on the PPC would need some sort of Rosetta-esque system to run on Windows on x86, and that's bound to lead to a performance hit of some degree (though admittedly the power of today's hardware makes that more and more of a moot issue).
But that leads me to my other question: "Why"? If you're going to go to the trouble of getting XBox 360 games to run on Windows...why not just get the developers to natively release the game on Windows? PC gamers are all complaining about suffering the indignance of playing sub-par console ports on the PC (and rightfully so!) - the answer is to vote with our wallets and support developers who give PC users proper games; maybe it's just me but I don't think the answer is to start playing console games on our PCs...
I really get the feeling that this is more just wishful thinking, and less substantive rumour.