Do people buy things from Microsoft? hahaha.
Well, yes. 90% of the world PC operating system is using window. So what do you think?
This is not what Microsoft is accepting bitcoin for. They are only accepting it in their xbox store (not for actual xboxs though) although they may expand this in the future
They will. It's just a matter of when. The more time you take to accept bitcoin as a businessman = the more of a dumb idiot you'll be seen as in the future for not having the balls to be a pioneer.