You also only live once...Im on the fence right now. I have a m1 IPad Pro. One things that always bothered me was the screen blooming which the OLED seems to have resolved the issue. The games I play on my ipad is mostly streamed from my PS5 or XBOX so the extra power from the M4 wont make much of difference for me. It just sucks I have to get a new apple pencil and Magic Keyboard if I get the new M4 iPad.
If you have the funds do it, and recoup some with selling which is what I did, not so much if a big bank account hit.
The screen is brilliant.