Just saw the new OLED IPP 13 in person and it was very hard to notice any marked improvement over my M1 IPP 12.9. I don't know what people are smoking when they claim significant improvement over MiniLED. To me, it was not night and day and I had to look hard to spot differences.
Side-by-side, with full brightness on both iPads, the OLED had very slightly better saturation. The OLED did look crisper in some scenes and I think that's due to the faster response time as the M1 12.9 would blur slightly in comparison.
At first the weight reduction felt impressive for the M4 IPP 13, but then I took my M1 12.9 out of its cover and the weight difference wasn't substantial.
At least I saw for myself it wasn't worth the upgrade. I ended up trading in my M1 12.9 and a 2015 MBP 13 for some gift cards towards future tech I'll want/need.
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