Alright, now I can finally give my opinion after having purchased it, and comparing it against my M2 iPad Pro.
One of the features, if not THE feature, that made me pull the trigger and spend 1k€, was the improved microphone array, as I use the integrated microphones A LOT. Judging by what I saw and heard on some YouTube reviews, the M4 microphone system sounded way clearer, at least during the video-calling test. I don’t use them for video calls but rather for raw recordings and, to my surprise, the differences are minimal in this context.
The screen, oh yes, the OLED screen offers such true blacks that make you see your old LCD look kinda grey. And color reproduction is a bit better than the LCD iPad Pro, especially from angles (I didn’t expect that, because OLED iPhone usually have such bad angles that, if you aren’t looking from the front, the screen looks greenish).
However, during the first two days, it gave me the usual PWM sensitivity symptoms: nausea, headache, itchy red eyes, and blurred vision. The third day the symptoms were less severe but still uncomfortable. Maybe after an extended period my eyes get used to it, or maybe not. Is it worth the effort though? In my opinion, not in my case. The LCD from my M2 iPP is already very good, with Pro-Motion, and very comfortable to look at.
The weight reduction, even on the 11” model, is noticeable. Just for that, I would switch to the new model, if I didn’t have the eye sensitivity to OLED screens. It feels well built just like the previous model and with the reduced weight and the slightly narrower screen form factor (in portrait), plus the center camera and two or three ambient light sensors, make this a really compelling -although overpriced- tablet.
That said, I’m most likely returning it, and either keeping my M2 iPad Pro, or selling it to get the 1TB/16GB version of this same M2 iPP if I catch any good deal. Why? This is probably the last high end iPad with an LCD display. I thought the microphone array in the M4 was vastly superior to the M2 model. According to my tests, they aren’t. And the itchy sore eyes, the light nausea and the headaches are just not worth it. Sure, the 6 efficiency cores really make the M4 model cool, silky smooth and snappy even in low power mode. But, in my opinion, it isn’t worth the drawbacks I’m suffering from the OLED technology.
If you want me to perform any side-by-side comparison of both iPad Pro, just let me know!
PS: in case anyone is wondering, I chose the Space Black one, way darker than my Space Grey M2 iPad Pro, and I absolutely love it, despite being more prone to fingerprints and smudges. I would choose the black one again in a heartbeat.