2017 when Matt Miesnieks spilled the beans. Then it seemed possible now it seems close to a metaphysical certainty......

A high-res OLED microdisplay from e-magin, suitable for a HMD (or a Watch). The image is projected into the waveguide which spreads it over the plastic lens in the glasses so you can see it in front of your face.

https://medium.com/6d-ai/why-apples-glasses-won-t-include-arkit-46a1d40381fe