I haven't used it, but my understanding is that it's vaguely like Second Life, popular with folks creating adult-content-oriented-worlds.

From a technical standpoint, that might actually be a pretty good example of a game that would benefit from cloud gaming, since I assume that it's not all that latency-critical, not the way an FPS would be.

I guess that there would potentially be privacy issues with adult content stuff that would argue against cloud hosting, but in the case of VRChat, the service itself is already living in the cloud, so...shrugs