If PSVR 2 takes off, MS will likely announce something. But if PSVR 2 sells similarly to PSVR, then MS likely won't bother. Hell, if PSVR 2 doubles the sales of PSVR, MS will likely not bother. IMO, it'd need to sell in Quest 2 numbers or greater and most importantly MS would need to see sales of VR titles start to take off before they commit to a VR release for Xbox. Basically it needs to move more software (games) than Quest 2 before MS would likely announce VR for Xbox.
Ive been wondering why Sony doubles down on VR so much, it seems a really hard market to expand upon. At the same time its good that someone is considering it for serious gaming atleast. Right now we only have HL Alyx thats a worthy VR game. If Sony can inspire others for more of that kind of games its nice. As said, someone has to start with it.