This is huge win for Microsoft, which already had a big following in PC gaming with the Xbox 360 controller, and it ties a prominent VR platform to Windows.
A whole virtual reality economy is riding on Oculus Rift, which is the premiere technology for viewing apps in VR. Digi-Capital estimates that the combination of augmented reality and virtual reality will be a $150 billion market by 2020. The potential is so huge that Facebook bought Oculus last year for $2 billion.