Really, I could mount the thing in my room with the required distance, but I can't see two people moving about to play in here. My point is, it seems to m if the requirement from the camera is too much for you, then probably you wouldn't have space for two people to not constantly hit each other anyway.
And I had no idea living rooms in middle/upper-middle class USA were so small. I can see it being a problem in Japan of course, but other than that two and a half meters is pretty modest. I remember Tv manufacturers used to tell people to be at least that far from their tvs to avoid eye damage or something. Or maybe that was just our parents bitching.
Anyway, I think if Microsoft wants the expanded audience it's kind of supposed that most of these new market sales would go to living rooms, not small gaming cubicles. But of course old 360 owners, the ones playing in those cubicles, are the ones more aware of Kinect, so I guess this number would naturally be inflated.










