It might finally be possible, according to this report, to have cross platform gaming with PCs running Win8 and X360s (and also Windows phones).
If that happens it'd be great. I'd be keen to know if its backward compatible too, so for example a game released last year for pc/x360 can be played or if it will only be games released after Win8 is out
Microsoft merges Windows 8 with Xbox Live ? reghardware
Yep, Windows PCs, WinPho and Xbox 360 users will all be able to play against each other. Now we're talking.