Well, Stu, get technical here... how are they important, what difference does it really make now in this 3d world?
(I'm not trying to argue, I just really don't know...
)
I mean, would Xbox's preformance be any better if it had been 128bit? On the same note, why wouldn't MS just use this technology that's already out if it made any type of positive difference. I mean, right now the two most powerful consoles out there aren't even tru 128bit systems, yet two "less powerful" systems from the same gen are 128bit.
-EDIT-
Oh, and what I meant by useless was that's it's useless in comparing the raw power of consoles now.