I admittedly don't have any data, but the fact that Microsoft seems to be backing away from any implication of gaming for their own headset and seems to be avoiding VR for the most part tells me something. Also, the whole concept and setup is still just too niche for a large company like Sony to continue it long-term. This technology will likely continue to live on PC for several years before it could become anything close to a consumer electronics item that a large corporation wants to produce again. I hope I'm wrong because I don't like to see anything fail that people enjoy, but I'm guessing that PSVR isn't selling any better than the Vita, so once the initial round of development wears off and the newness wears off, Sony will start to sunset it like they're doing with the Vita. This is, of course, unless Sony has some great next gen version that is much more advanced, compact, and wireless that they are planning to introduce that might shake up the industry.
As far as Microsoft goes, Hololens was not designed for gaming in the first place and costs a few grand, no way that'd be feasible for them to try and implement with games to begin with.
As for sales, it's selling way better than they had expected, which is why there were shortages for the first few months.