I don't understand the value proposition because I believe most of these problems (with the exception of possibly the last) can be solved more easily.
Video instructions - even if overlayed in Google Glass, let alone a nearby phone or tablet - will do this fine. This is the most compelling AR demo I've seen that realizes your first idea: http://www.youtube.com/watch?v=eVV5tUmky6c
While it's super-cool tech, I really feel that a video screen or overlay video does the same job just fine. It's still digital content consumption, at the end of the day.
So then there's digital content creation. Well, you can try sculpting or designing structures with your hands some virtual 3D models all day, but I bet (and please correct me if I'm wrong) that it will never be as efficient as using CAD with a screen and qwerty keyboard.
"Assessing volume and packing a truck or car optimally." Hmm, this sounds like an interesting use-case. Could you give an example of where this might save people tons of time and/or money?
As a glasses wearer, I feel like replacing my lenses with screens eventually is a forgone conclusion.
Imagine something with LIDAR, scans the engine block to know what model year you are working on and pulls up the Chilton Manual 3D app and suddenly you know exactly where that vacuum hose is that you want to replace.
The packing one is just because I'm moving right now, and again, what I want is, something to scan the boxes and the vehicle and let me know how to fit the most stuff in. It wouldn't have to be glasses, but it wouldn't bother me.
You bring up input devices and such, and I really just think of it as a display, plain and simple. I would much rather manipulate interfaces that I already know or are made for manipulation. But I don't need to carry around a screen all the time, either.
tl;dr I don't want to wave my hands around like an idiot OR hunch over staring at a screen.
Video instructions - even if overlayed in Google Glass, let alone a nearby phone or tablet - will do this fine. This is the most compelling AR demo I've seen that realizes your first idea: http://www.youtube.com/watch?v=eVV5tUmky6c
While it's super-cool tech, I really feel that a video screen or overlay video does the same job just fine. It's still digital content consumption, at the end of the day.
So then there's digital content creation. Well, you can try sculpting or designing structures with your hands some virtual 3D models all day, but I bet (and please correct me if I'm wrong) that it will never be as efficient as using CAD with a screen and qwerty keyboard.
"Assessing volume and packing a truck or car optimally." Hmm, this sounds like an interesting use-case. Could you give an example of where this might save people tons of time and/or money?