Well... I hope it IS for xbox, but I hope it's on other platforms as well or all the folks who don't have xBoxes (or 360s, since it's more likely to appear on the newer generation console) can play it too.
I mean, c'mon OWI. The past two games have only been on Xbox. and that ain't fair - the first games are available for everyone with a computer (ah the good old days of Abe in 2D) and now they're restricted. Damn, that's crappy.