I don’t think that’s possible. This would require to have an API to interrogate the OpenXR runtime. These are typically not exposed to developers and only for internal use.
Yes 100%, all cards.
I think this remains subjective. I am hoping that everyone can find their happiness in the choice between the 2 and the various factor/sharpness settings. But no rule of thumb AFAIK.
It’s VR only and mostly intended to address the issues described here: