[wkat4242]

That's not what I mean. I mean the display inside the lens would require a radically different focal distance (it's less than a millimetre from the lens) than the world outside (where you would view between 20cm and infinity). I don't really see how they could consolidate that within one lens.

[lutorm]

It's actually impossible to focus on an image within the lens, sort of by definition. It said the display is holographic, which I guess means that it will diffract light to create the appearance of an image at infinity, while not actually making an image in the traditional optics sense.