There's a lot of comments here about how Glass will affect social interactions, which is fair enough as that's the easiest use case to grasp at the moment, but

There's a lot of comments here about how Glass will affect social interactions, which is fair enough as that's the easiest use case to grasp at the moment, but the thing that struck me most was the tiny snippet of footage of that jeweler (sculpter?) creating the glass tiger, almost like it was an afterthought in the marketing team's mind. However it struck me - suddenly there is potential to introduce a HUD into industries everywhere, which I think could have some far-reaching benefits. For example, imagine a surgeon having vital signs overlaid on their vision as they worked, or a superimposed CAT scan, or whatever else would help them out. Or (being trained as an engineer myself, I understand how much value this would have), an overlay of the structural drawings as I inspect a large building site. To be honest I agree with most of the negative sentiment towards how Glass could damage social interactions, and I wouldn't be unhappy if it never saw the light of day in that use case. But there is incredible potential as a productivity tool.