Other than display, which I don't care much about on smart glasses - I want smart glass that can auto focus whatever I see in whatever distance.
I have near sight and then old eyes - so I can't see far without glasses and can't see near with. I have to constantly pull the glasses down the nose to read smartphone.
I know bifocal glasses are out there, would love to be able to see anything at any distance without getting used to bifocal glasses with automatic eye tracking.
That would be a real smart glasses worth spending some good money for me. Automatically adding good tint or 80s style mirror finish may even be great!