Aside from the mismanagement of the software/hardware associated directly with Google Glass the true problem it had was the contradiction between the benefits of the user and those around the user. The single greatest thing about Glass, and it really was brilliant, was the ability to take pictures that almost perfectly captured your field of vision. This is, however, the precise feature those around you might take objection to. Take that feature away and Glass really has no use at all.
The irony of this is it's not hard to conceal cameras on people in order to record their surroundings if you're so inclined, and the reception to Glass just demonstrated how opposed people are to this when it's a visible intrusion, regardless of the actual threat presented.