That was the real "killer app" for a device like this. Augmented reality is one thing, but even having a wearable reader that could both magnify and fix colour

That was the real "killer app" for a device like this. Augmented reality is one thing, but even having a wearable reader that could both magnify and fix colour and contrast would be a huge help to an awful lot of people. Or one of the killer apps, at least; many's the time in my youth (as an avionics tech) when I would have killed for a HUD that "knew" what I was looking at when I had both hands busy while crammed feet-only-out into a dark space about the size of a small microwave oven deep in the guts of a military aircraft. I imagine that isn't the only kind of job where something like that would come in pretty handy. But that's not kewl or bleeding-edge, just practical and productive.