Lol. I think optional, customizable always-on-top floating panels is only a matter of time. The developers also are aware of the benefits.
For instance, now driver creation utilizes technically a floating panel. If your mouse even accidentally leaves the menu, it closes, which is very annoying, but I doubt that’s the end goal behavior.
It’s not AR, but if you have a VR device, you might be interested in this: BlenderXR: Modeling features development