Holographic lenses - something I'd not heard of before. I am glad there's big R&D efforts in lenses as I think that's both the hardest and most important proble

Holographic lenses - something I'd not heard of before. I am glad there's big R&D efforts in lenses as I think that's both the hardest and most important problem to solve. Moore's Law and software will solve all the other problems fairly quickly. But fixing the lens challenge requires hard-code physics. My bet is still on the arrival of visible-light meta-materials that have a negative index of refraction and therefore make flat lenses possible. That'll be a step function transition for XR, and open the path to mainstream adoption.