That's not necessarily true. There are several optical passthrough AR glasses today - they're not as light as one would like, they require external compute, and they need quite a lot of UX work - but they exist today. The most recent example is the Xreal Air 2 [0].
> And adding cameras to project the lost vision is not good enough.
I think that's fine as a solution, if
> And adding cameras to project the lost vision is not good enough. Having something strapped over your eyes for a long period of time (say, an hour) is just fundamentally unpleasant. Even normal glasses are uncomfortable and people avoid them as much as they can.
we can resolve this. The headsets are getting smaller, and the AR glasses are getting more powerful. Meta are working this from both angles with the headsets and their glasses. The glasses seem to be doing alright (more time required) [1], and lighter headsets are possible [2].
My suspicion is that people are willing to tolerate some degree of discomfort - discomfort that will get smaller over time - if it's a sufficient value-add to their life. We're at the very start of that; check back in a year from now when developers have had plenty of time with the Quest 3 and the Vision Pro demonstrating Apple's vision for UX and software.
[0]: https://www.tomshardware.com/reviews/xreal-air-2
[1]: https://www.theverge.com/23922425/ray-ban-meta-smart-glasses...