I can's see the appeal for me but I think I can understand where Apple is coming from, at least in theory. More AI in phones means an excuse to sell you more powerful phones.
Unless you are very into having the latest piece of tech or your old phone dies, I haven't seen much that a new phone can do and my 4 years old one can't, so many people (including me) are sticking with their old phones for longer. AI seems like it has the potential to put something new on those marketing assets. Granted, it worked like shit with AI laptops/Copilot PCs but Apple has a knack for turning others' failures into long lines of people fighting to give them their money so we'll see...