Most people would still end up buying Xbox One due to a lack of choice. I would guess the current gen market would be slightly smaller than what it is now, and we would see less support from MS as they wouldn't have a reason to try to please gamers to buy their system. It would be worse for non-Nintendo console gamers overall. Nintendo would be slightly better off, but not a big difference.
I wonder how it would affect the PC games. Would MS actually support both in terms of gaming?







