VR is by its nature immersive. Immersion is inherently at odds with quick and easily digestible.

3d video served by an AR sunglass display is plausible (but probably way overkill for the next decade), but feeling like you're in an entirely different environment while waiting in line at the post office is never going to be a thing people want.

I disagree that it’s that much different from people being immersed in their smartphones, not taking notice at all of their surroundings anymore. With a sunglasses-like solution, you probably would/could still see the actual surroundings in your peripheral vision, or via pass-through, similar to how you can still hear your surroundings through non-sealing earphones, or via pass-through for sealed ones.

Very implausible imo, have you used VR before? Will never be safe to use in public spaces: what and who is around you is unpredictable, so only AR will be viable.