A better example is the welding mask Steve Mann came up with that let welders see the arc and surroundings at normal brightness as well as giving a real time readout of arc length.

The future of AR isn't an overglorified clipboard, it's adding meaningful information to our vision in real time. Motion enhancement to spot loose parts, variable polarization to see stresses in materials, precise measurements without needing to stop and get equipment, clear vision despite lighting conditions, and even translating parts of the spectrum to visible.