In reply to Seppo.

Oh, I get it. That's an example of how I'm terrible as a "futurist," because I have next-to-zero interest in any technology that will take beyond my lifetime to achieve. Unless there are genuinely transparent LCD experiments out there.

I agree that it's kind of pointless to be pursuing something that is "real" AR unless you really do expect the device to be ubiquitous and worn casually. But even headphones -- which are about as unobtrusive as we've got in terms of technology -- require a mode switch and can't usually be worn ALL the time.