We shall see.
I think Natal is a big deal, it reminds of me of the PS2 in some ways. Thing is, maybe it's dwelling on a paradigm which wasn't created by third parties or the gaming industry so that support may or may not matter, or maybe it's something entirely new.
I don't think I can make a prediction yet, I need to know quite a bit more about it. Including genuine consumer hands on experience with some games.
EDIT: On second thought, that's my non-brave prediction. My brave prediction is the same as Zlejedi's.