WebGPU is coming, and VR hardware is only getting better. It seems obvious that WebXR is the path to a distributed, 3D web that is interoperable by default and not owned by any one company. The key here is open standards and protocols.
Here's a thread I made with more thoughts on the metaverse emerging from the web:
https://twitter.com/AlexStLouis10/status/1454641980542095363