The optics R&D  company Hypervision provided a detailed design analysis of the Apple Vision Pro's optical design in June 2023 (see Apple Vision Pro (Part 4) - Hypervision Pancake Optics Analysis). Hypervision just released an interesting analysis exploring whether Micro-OLEDs, as used by the Apple Vision Pro, or LCDs used by Meta and most others, can support high 60 pixels per degree, angular resolution, and a wide FOV. Hypervision's report is titled 60PPD: by fast LCD but not by micro OLED.