I think the next XBox won't be a traditional console. I'm pretty certain that Microsoft wants to combine their windows store with the Xbox ecosystem. It would be only logical for them to make an Xbox that is basically a PC with some kind of basic Windows and access to the windows store. If they can get a few millions of players on board that way, that would help Microsoft in the battle against steam on the PC front.
I wouldn't be surprised if there basically won't be Xbox games in the future. Instead, it will be just Windows games and Microsoft will probably launch a line of cheap hardware with the Xbox brand capable of running games for Windows 10. I mean I could be wrong. But it would make a lot of sense.
Official member of VGC's Nintendo family, approved by the one and only RolStoppable. I feel honored.