The AirPods Pro have become personalised hearing aids, that's a pretty cool and innovative change.
The iPhone had a pretty substantial upgrade, especially when we take into account the hardware changes in support of AI.
Also I accept it may not sound like much, but the Pro's ability to layer voice notes is a really cool addition. I'm only a hobby musician, but one of the most popular tools that musicians use is a looper pedal, which lets you record one thing and then play or sing over the top of it. It's really useful for rehearsing, improvisation, writing songs etc. The iPhone has basically just massively reduced the need to buy a separate one, and has the added benefit of saving those ideas.