i think different
no, xbox is just a console. i guess ms made this move to hinder development of freeware media editions for xbox in order to sell their own. i am quite sure xbox2 will not run os x under any circumstances.
imagine, user buys xbox2, finds out that it can run os x, does some warez-crap, installs os x and finds out that it is far better than his windows. after that, he buys a mac.
ms would never want anyone to try mac. thatīs just a step in the wrong direction.