I want to downvote you for using VR first OS, which is technobabble, however I want to upvote you for sharing useful info about the topic. So I did neither.

Augmented reality pretty much requires us to shrink displays down to contact lens sizes because we already figured out almost nobody will pay to strap a smartphone to their face.

Then it requires us to create and popularize an entire new method of interacting with your computer.

Then this needs to be cheap enough to get in everyone's hands.

It would be surprising if this only took 20 years.

This is about drawing dumb drop shadows.

We could argue about the difference between OS and presentation layer but that battle may already be lost.