I do wish someone attempted a ground up AR OS where experiences are shared to nearby users by default. AR versions of airdrop are pervasive, that sort of thing.

For example, think of the opposite of Apple's People Awareness feature. Instead of an immersive experience fading away when a person comes near, the AR user's experience fades in as you approach.

I think it would be pretty magical, honestly. One of the wow moments the public never got to (because of adoption rates) is a shared AR experience. Really compelling stuff.