That's nice, but it's just the display part. Now you need something to generate a high-quality display. Right now, the minimum hardware for that is probably a Playstation 5, which can run the Unreal Engine 5 Matrix demo. So you could do this now, tethered, with somewhat bulky headgear. Like the Star Wars Experience location-based entertainment system, which cost US$10K and required a backpack.

Carmack says all that has to be squeezed down to swim goggle size to go mainstream. Eyeglass size to become ubiquitous, like smartphones. Eventually, but it's some years out.

Meanwhile, we should see low-end standalone systems (Google Glass 3.0?) and high-end tethered systems with a base station doing the graphics.