I see a minor complaint about eye tracking, but people conveniently forget about the status quo. The status quo is holding large objects which are strapped on your hands and using point-and-shoot to click on items. You literally have to shoot items like on a shooting range, and hope that you hit. It's ridiculous. You can't use standard UIs with that kind of interaction, because everything is way too small.

And while you're strapped to those items you can't use keyboard or anything else with your hands. You can't scratch an itch or put something in your mouth. Your hands are occupied and you feel like you're in jail. Surprisingly you actually want to have hands.

This is the single most important innovation in Apple Vision. It gives you hands.