I'd assume they'd have a keyboard and mouse for the XBOX, just like they had for the DC (not sure about the keyboard).
I agree, I doubt that it'll come to the XBOX. MS and Id aren't exactly the best of buddies. John Carmack doesn't like Direct3D at all, which is why he only develops for OpenGL. Maybe it'll come to some other console though (Quake 3 was ported to DC and PS2).
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