I tend to think this is more about SE needing to make as much money off of FFXIII as possible and the install bases (distribution, etc.) of the two consoles than anything truly significant for MS. I guess seeing a true Final Fantasy game on a Microsoft console is a bit surreal, but other than that it's just another example of MS getting more third party support this gen than last.
Edit: I'm also fully expecting Versus to go multiplatform.







