This is what I came here to say as well. I doubt the current models will get the full array of AI features.What gets me with all this AI talk, is how much of it Apple will lock behind new devices, even though it'll mostly all be software and cloud based.
Just look at the marketing of Samsung’s Galaxy S24 lineup. They‘re calling it an AI phone instead of a smartphone.
Maybe the iPhone 15 Pro/Pro Max will get close to the same number of AI features as the 16. I’m very curious how Apple plans to stagger the AI features/capabilities across their different devices.
Perhaps only the 8GB RAM models will be fully functional with AI. There could be AI and AI Plus levels. We’ll see.