I suspect they have by integrating AI into real-world UI refinement. I linked this video in the other thread, it is worth a watch:
The key point he makes is if Apple are correct and their AI can actually grasp ‘intent’. If that is the case and it really can join the dots in the way the example in the keynote describes, and do that sort of thing reliably, then they are onto something. Too many people are thinking of AI as a big scary sci-fi monster thing. My suspicion is Apple are thinking of it as another level of user interface design and end-user convenience.