@ naznatips
If they don't care about how much money they lose over at MS then nothing they do is ever a risk so your point is moot.
@ Pristine20
The research involved about 20 seconds on Wikipedia, but I see where you're coming from. As for your second point, what great games are you thinking of that didn't sell well due to saturation? I can only think of the Orange Box, and that because most of its content has been available for awhile already on PC.