I have had an opportunity to see a demo by another stealth company (which may have been quietly acquired by Magic Leap since then). They used lasers to project light directly onto my retina.

It was nothing like Magic Leap, no 3d, just test 2d images - and yet, these razor-sharp, light images that I was able to see in front of the sun, were better than any computer display that I've ever seen. I don't know how would I convince anyone about the quality of the product aside from telling them to see for themselves.