I think you at least get the vision, however I believe the current web standards is what is preventing forward progress. What you describe could be achieved much easier by moving sandboxing into the OS and using containers. I'd much rather see a modern markup format for describing content and data than what we have today. Not 1000x bloated frameworks to do simple things. I believe it we are ever going to make the metaverse a reality we have to really reenvision our current technology not on what we have today by trying to incorporate next gen solutions into a failing model but create something new and expandable that is easy to get started.