[nblgbg]

That doesn't seem to reflect in the battery life of these. They have the same exact battery life. Does it mean it's not entirely accurate? Since they don't indicate the battery capacity in their specs, it's hard to confirm this.

[davidee]

I haven't paid too much attention today, but what I did see with the iPad Pro was that they're using an OLED display (maybe even some kind of double layer OLED for increased brightness if I'm understanding the marketing jargon?).

I believe that OLED is much more power hungry than the previous display type (LED backlit LCD of some type?). I could be wrong, but in TV land that's the case...

Could explain, at least partly, why run time isn't greatly increased.

[hmottestad]

They made the battery on the 13" 5% smaller than the previous generation. They also write that they tested the device with auto-brightness disabled and brightness set at 50%. Not sure who the brightness slider works on the new iPads since the iPhones don't get max brightness unless auto-brightness is enabled. So 50% might be 1000/2=500 nits on the M4 iPad Pro and 600/2=300 nits on the M2 iPad Pro, or they might both be about 300 nits.