I doubt playstation is going anywhere.... even if sony went belly up someone would buy the playstation brand, and continue it.
If Nintendo's switch is a huge flop.... I could see them going mobile / 3rd party.
Microsoft seem to want to just have a windows box... eg. just a traditional pc, with windows be the "xbox" of the future. In that sense I could see microsoft leaveing it.
Its between MS or Nintendo imo.







