Perhaps this could work for some, but for front line workers (the target of Hololens) it absolutely would not. The entire current mission of Hololens is to empower front line workers that currently have access to no computers at all, people that work with their hands and can't have a smart phone, keyboard, monitor, etc right in front of them.
I see frontline workers use those thing every time I interact with them, far more efficiently than anything real demonstrated in a Hololense video so far. If you're working with your hands, it's very likely you can't afford to have you FOV obstructed by much. For example, I'd freak out if I saw a surgeon wearing one. I'd much rather they be looking at a magnified view, fed to a high-speed 2D display than a laggy 3D approximation of reality.
