The process used to make Micro-OLED displays is very different to the processes used for large OLEDs or LCDs, it has more in common with silicon manufacturing t

The process used to make Micro-OLED displays is very different to the processes used for large OLEDs or LCDs, it has more in common with silicon manufacturing than conventional display manufacturing. AIUI that means the panel size will always be limited by the maximum reticle size of the silicon process, which is usually at most ~800mm². That lines up with the 27.5x24mm size of the panels in the Vision Pro - that's 660mm², already close to the largest silicon die you can make.