I think the average iPad user doesn't have a clue what the difference between HVEC and ProRes is and is better served with HVEC coz it's more compressed and has greater compatibility.
I think ProRes via FilmicPro is a fine solution.
It's just an iPad. It's not gonna be great at video. ProRes should definitely be on higher-end video cameras. But an iPad?
That's fine but Apple promoted the new feature. The great benefit to shooting in ProRes is that the subsequent editing is working with much less compressed video. Shoot in HVEC and that very-highly-compressed video gets edited and then compressed
again for a final render. For anyone buying any iDevice wanting to end up with the highest-quality render, they should shoot with the highest quality format (ProRes), edit and then render to HVEC or whatever they want.
It doesn't really matter if the average iPad user has a clue or not. It's a benefit promoted by Apple. Some may buy this new iPad to utilize this new benefit.
Apple is promoting these "pro" devices for Video creation... for making films... with marketing spin like editing X streams of 4K at the same time, etc. For example...
Yes, that's iPhone Pro instead of iPad Pro but Apple is clearly conveying the concept of shooting "motion pictures" with the power of iDevice PRO. See this Apple video from about this point...
Pay attention starting at 5:20+... "a complete movie studio right in your hands"
If they are going to promote it, deliver on the implied promises. Else, getting away with overpromise:underdeliver too much and it can become a very bad marketing habit... as it does for MANY companies.
Of course I believe Apple will "fix" this in software in some future update. Apparently, they just couldn't launch on schedule and include this too for their own video app. But that might make yet another case for them doing something we often tout: "take the time to get it right" vs. force something out that is short on its promises.
And the problem with "a future software update" excuse I just implied is that it depends on Apple actually getting to it. I bought a generally spectacular Mac Studio Ultra way back in March. It has a few software bugs still waiting to be addressed in a "future software update." It's not so far from being a year old. I wonder if those bugs will be fixed by then.