There is no standard for a federated or distributed metaverse. I run a server, you run a server, a user enters the world on my server, walks through a portal to your server. How do you represent links/portals? How do you maintain your visual representation across servers? How do you take objects across servers? Is there a realtime communication system? Are there standards around styling? Graceful degredation with weaker hardware or low bandwidth? A non-proprietery object/scene representation format that can be inspected and shared across domains?