In 10 years, my hopeful list is:
* More custom/specialized silicon for XR. There's aren't many players here currently.
* Retina/~60 PPD.
* Micro LED (not OLED), making varifocal and HDR possible.
* Varifocal lenses, which are just as important for comfort as high res.
* Cameras optimized for passthrough, rather than borrowed from cellphones.
* Lighter weight. They're almost tolerable, rather than acceptable, as is. This almost certainly involves offloading some of the compute.
But, a powerful untethered XR system and a lightweight set of untethered glasses will necessarily be very different, in capabilities. I imagine I'll end up with a tethered device, as a display replacement, in the next 10 years.