I think there’s plenty of evidence that they’re better in jet fighters (where users are well-trained), possible also in automotive (where they have been sold for decades; see https://en.wikipedia.org/wiki/Automotive_head-up_display), but of course, it will depend on the design of the HUD and on what it displays.

Extreme example: showing random ads every ten minutes, even if the glasses c/should suspect you’re driving a car. I have my doubts as to whether Meta will make the right choices here.