OLED is a better technology in every way over miniLED with one major exception: burn in.
Because of the iPad being used for hours of drawing, I imagine this is a big reason they will stick to LCD. As much as my media-consuming and doesn't-draw self would love love love an OLED iPad, I think they will do a compromise with miniLED and stay there until they can find a good solution for burn-in on both OLED, and microLED as any self-emissive display type will battle burnin problems.
Same goes for the Mac, but not due to being used for drawing but due to static interface elements that are used in desktop interfaces (vs mobile or TV).
Because of the iPad being used for hours of drawing, I imagine this is a big reason they will stick to LCD. As much as my media-consuming and doesn't-draw self would love love love an OLED iPad, I think they will do a compromise with miniLED and stay there until they can find a good solution for burn-in on both OLED, and microLED as any self-emissive display type will battle burnin problems.
Same goes for the Mac, but not due to being used for drawing but due to static interface elements that are used in desktop interfaces (vs mobile or TV).