How are those two not the same point?
They didn't really talk about user experience, because they have barely answered "OK, the 2018 iPad Pro is wicked fast… what does that actually do for me?", and they certainly haven't answered it for the much-faster-yet 2021 iPad Pro.
What's the killer app?
The killer app for the Mac appeared after a year and a half in mid-1985: desktop publishing. Software drove hardware and hardware drove software. Color in the Macintosh II was huge. Larger displays were (well, literally) huge. Performance improvements actually helped tremendously, cutting workflows from hours to minutes to seconds.
11 and a half years after the iPad and 5 and a half after the iPad Pro, what's the killer app for the iPad? Drawing? Painting? Maybe, but even those barely seem to max out the CPU.
It's a valid question to ask and doesn't mean the iPad sucks or Apple is doomed.
Yes, I think adding mini-LED is a good choice, but I think "user experience" there, too, is a stretch. It's mostly a major spec bump. It doesn't really enable anything you couldn't previously do.