What I do expect is for them to use LLM-style AI to enhance the use of their existing features. Make photos easier to cleanup. Make music playlists better. Make it easier to create calendar events. Suggest code snippets in Xcode. Make it easier to find what you want in Spotlight or in the App Store. Make Siri smart again. Give Siri enough ability to understand intent and to clarify requests and then be able to match that to available services. Maybe even be able to do more than one thing in a sequence. Make it easier to automate all kinds of tasks.
Using AI for that gives more control to the users and surfaces functions that are otherwise hidden or hard to use.