How good is the integration with Safari?
The use case I really care about is having to re-enter stuff like my name, address, phone number, known traveller ID, etc etc EVERY DAMN TIME I interact with an airline or hotel or whatever. The semantic web was supposed to do this for us but that crashed and burned (I still haven't seen a good post-mortem as to quite why). So for twenty years we've had this pathetic half-solution that can usually fill in your name or email address, can do your phone number about half the time, and fails at everything else, like your address (presumably, at least in part, because every damn web page formats and labels their forms differently?)
Apple Intelligence certainly, IN PRINCIPLE, can do this - has both the language knowledge to know what's asked for in each field, and the user knowledge to fill it in. But I don't know if they've yet hooked up this (obvious, but perhaps more complicated) use case.