One of the ways I suggest people think about AR and VR is that -

One of the only significant differences is whether or not the skybox is filled in.

Broadly the technical requirements of the object tracking, 3d visuals and user interactions will be very very similar.

I suspect you'll end up writing applications with basically the same stack once we get there.

Useful applications across both VR and AR are more likely to be holographic in the sense that they are free standing in 3d space and designed to inhabit whatever 3d space WITH other applications.

The current VR "draw the whole world and totally control the ui" is this fields DOS era.