I’ll put it out there right now. I think we’re going to see the Oculus Rift work with the xbox one.
It makes sense, they’re working on Windows software which could easily be adapted to work with the Xbox One, especially when microsoft launch windows 10 on Xbox later this year.
Sony have the Morpheus, but Microsoft haven’t announced anything yet, Hololens isn’t close to what the Morpheus is offering, so it makes sense to partner with Oculus to use the Rift.
the Xbox One has 3 usb 3.0 ports, an HDMI connecter and wireless controllers, it also has enough processing power to do VR if comparisons to the PS4 are anything to go by, Directx 12 will also help a lot with performance.
Responsible Adult Nerd 
My prediction has come half true already! Oculus are packaging an Xbox wireless pad with the Oculus Rift headset. Also, streaming Xbox games through the PC to the Rift is also a feature when the rift ships next spring.
There’s an announcement tonight at the game awards, which could well be Palmer showing Luckys tale playing on an Xbox One using an Oculus Rift and no PC.