https://github.com/microsoft/MixedRealityToolkit-Unity
Though it would be nice if everyone could get on an open standard, like https://www.khronos.org/openxr/
The big question I have about the future of AR/VR/XR is how do we have shared experiences across devices without putting significant compatibility code on the developers?
I think that gaming platforms, because they have long had to deal with the confluence of multi-user, low-latency, permissioned systems, are better poised to be the basis for shared experiences in XR
Isn't this already the case? As far as I'm aware all major headsets support OpenXR, it's the games that are lagging behind. Hopefully this is going to include Apple, of course.
Maybe our tools like Unity can manage this, to reduce the pain...?