I know the thread has now veered off from AI to Apple's latest gadget (possibly as important as the launch of the iPhone, we'll see) but I'd just like to add something on AI and photo editing from the perspective of a basic user.
Forget generating elephants in space suits and liquidating entire crowds from St. Peter's Square...
I think a piece of software that can offer people with basic skills like me the following:
Easy background replacement (especially if shot on a green screen or neutral background)
Easy outcropping to fix minor problems with framing
Easy facial feature correction (face-aware warp, etc., eyes, mouth, reshaping, etc.)
Easy removal of problematic elements (no, not everyone in St. Peter's Square, just maybe a dog or plant or whatever)
Easy replacement of maybe patterns, textures, hair colors, etc.
will be successful in attracting what you might call semi-skilled amateurs, which is, I would suspect, not a small market.
I'm very comfortable with Affinity Photo now after having used it for 18 months or so, but I am now changing to Mac and seriously weighing up a PS sub or buying Affinity on all platforms for the (effectively) low package price they offer the suite at. Maybe I'll try both approaches.
But the time-saving aspect of PS for my hobbyist interests is very tempting. In some ways, it's refreshing AP doesn't hold your hand like PS does. You learn a lot. But the trouble is, as others have said, once you have learned how to remove a background perfectly, it does not get that much faster, just better. For us hobbyists, who are spending our time on photo editing but getting no money for doing so, saving time is going to be a key factor. (The permanent sub to PS is of course a pain but then again, PS is now effectively server-powered photo editing, so it actually makes more sense than before.)
Just my $0.02.