Depends on what you mean by "good." If you mean that level of consistent model fidelity and aesthetics, then the answer is "never" and it only takes one look at VR chat to know why. That's the real metaverse, not whatever Facebook is peddling. Given free reign, people will drown you in fursonas and anime girls that never belonged in the same room together. And that's a good thing, it shouldn't be some sterile environment where people are forced to be part of some specific aesthetic.

If by good you mean widely adopted, I think other responses have addressed that.