I suspect that fitting something like this into what looks like standard prescription glasses will require some advances in manufacturing optical materials. I think its already possible to make the appropriate lenses to sufficient precision, but the cost is a bit prohibitive.

The other issue is that the projection display is a bit low-res for what I'd really like to see, but 1 pixel works out to ~0.5mm at 1m, so it might be ok. That might be precise enough for (for instance) identifying particular through-hole connections on a circuit board at a rework station. It's certainly adequate for identifying components on an engine.