I don't think they'll kill XBox now. If One loses a lot of market share, I could see them dropping the product or selling it. They need to keep Bing to prevent Google from having a monopoly, and using said monopoly to take over the MSOffice sector.
Also, saying a business-focused company doesn't need to worry about private consumers is stupid. See: Blackberry. If you love your iPhone at home, why would you want a different product at work? MS needs a consumer presence because consumers run businesses.