When I am in extended reality, and you are in extended reality, how do we know we are in the same extended reality? Eventually this will become an issue as socially shared XR becomes ever more common.
I think we will develop an idea of guided tours. If you and I are in the same physical space, I might invite you to share my XR version of that space.
I can then show you virtual furniture, maps, ideas, works of art, organization charts, or pretty much anything of shared interest. When I switch to a different virtual overlay upon our real world, you will automatically follow me there.
In practice, people will likely take turns being the one to give the guided tour. Just like story telling, but visual and immersive.