> It might not come tomorrow or even in the next decade, but whenever the next shift in personal computing happens (maybe AI, maybe AR/VR, maybe something else entirely) they are going to be caught unprepared and unable to adapt in time.

I get what you're saying, but thinking about it, I'd be very surprised if the personal computing world ends up seeing anything like a paradigm shift that is so unprecedented it will catch the likes of Apple unprepared. And I realize it might sound arrogant or even ludditic to say this, but we'd need some sort of shocking new concept that no one ever came up with even in sci-fi. It's no longer really a matter of being able to technically implement something, but more about coming up with a human interface that is both totally novel and more convenient and practical than what we have now.

The qwerty layout comes from 19th century typewriters and we're still using it. The mouse was conceived of in the 1960s. Tiny computers that fit in the hand and voice operated devices have been utilized in early sci-fi works. And there's obviously VR, even though I think that's more of a toy than anything.

The only thing that is potentially in that same league of usefulness that I can think of is a brain-computer interface of some sort but those are currently so far away from having competitive practicality that there's a huge amount of runway.