I actually think industrial applications might be the hidden killer app for augmented reality. Imagine walking around a power plant and seeing your environment annotated: last inspection time for each inspection point, what is flowing through each pipe and its current pressure, etc. Construction sites could be truly amazing.
Glass is not an augmented reality device.
Why would anyone want to wear glasses to see text-messages instantly?
I use to be a glass enthusiast, but this single limitation is discouraging.