Joystiq
Joystiq News

Microsoft regularly uses for its technology (see: the original Xbox), and that's definitely true in the virtual reality era. The tech pioneer and 343 Industries have that they're working on Halo mixed reality experiences. The two aren't saying anything more at this early stage, but it's safe to say these offerings will run on Windows Mixed Reality headsets whenever they're ready... and of course, Microsoft is bound to hype them to the hilt.
Source:
Console Bang News!