Yeah, I would say this is not the biggest day for iPad since its introduction. Seems more like an evolution and the iPad finally getting tech it should've had for a while like OLED.
To be fair, screen-wise, it's the biggest jump since the Retina/third-generation iPad… Up until now, all iPads had LCD screens, and the jump from those to tandem OLED is as big as from non-Retina to Retina. These things can be used for colour grading, let that sink in. And they're not too expensive, which means a successor to the Pro XDR display shouldn't be too far off and not overly expensive (even if it's, say, 50% more expensive than the current model, the fact that it will have insane peak brightness – heck, make it a triple OLED deal if necessary – and not suffer from blooming will make it the best standalone display on the market, period).