Two things combined would make me upgrade from my 2021 12.9” iPad Pro;
-Larger than 12.9” screen
-Improved magic keyboard with function row
OLED alone isn’t enough or me. OLED will of course be a nice improvement over mini LED, but I’m not personally interested in just a 12.9” OLED with same keyboard and faster CPU than the 2021. The M1 is barely pushed now, and the 2018 is still a beast apart from, I assume, heavy video editing. The existing mini-LED on the current model is already fantastic, I’ve never quite understood why everyone seems to rag on it. Yes, there is blooming in certain situations, but it is nonetheless leaps and bounds better than normal LCD in terms of black levels. I think the moaning is classic internet, people who’ve never used it and have watched FUD videos about it.
As for OLED burn in, I’ve had zero burn in issues with multiple OLED displays I’ve used since 2017. I recall the LG OLED model before my 2017 had problems with it, but it’s largely a thing of the past unless you actively try to achieve it. Check out that YT vid of the guy who stress tested the Switch OLED, it took an unbelievably long time under the most ridiculously extreme conditions to burn in. And let’s not confuse burn in with image retention.
I love the Magic Keyboard. I bought two at launch, one each for my 2018 11” and 2018 12.9”. Hammered on them for years and they still work flawlessly with strong magnets and hinges. I really would like a function row though, something a larger iPad may be able to accommodate, fingers crossed.
Meanwhile, my 11” 2018 LTE iPP is still going strong, I intend to use that as my travel iPad until it explodes.