>>289925201
I meant just the markup language for 3d stuff. Looking at https://janusvr.com/docs/build/roomtag/index.html , looks about the same concept that aframe took. Looks like you can even look at a bunch of janusvr worlds in webxr now without downloading their client https://janusvr.com/web.html 

In related news, mozilla hubs now has self-hosting instructions https://hubs.mozilla.com/docs/hubs-cloud-intro.html . No real federation or decentralization though. I do wish there was a nice VR web browser on PC that supported both regular sites and webvr stuff seamlessly.