I really hope it does have support for windows mixed reality. In my opinion, it should have it. You can only use a controller or keyboard and mouse, so there isn't a need for every controller to be supported. The only thing is that would need to be done is head motion controls, which is possibly just a copy paste from another supported headset. It shouldn't be hard to get support for it.
a month ago
I'm also wondering about that. I'm considering to buy the new Reverb G2 when it becomes available as it specs and tracking convenience are superior in my opinion to both Rift S and the Index.
I hope we get some answer to this soon.