On iPhone vs. Android, the whole consideration is that the smartphone interface is the end of the evolution game. There might be a future where smartphones are just a more modest part of a whole wearables/ambient AI assistant/smartphone game.
There is stuff going on like Oracle’s suit against Google over use of Java and the Apple/Qualcomm battle and Huawei’s dominance in things cellular outside the U.S. The European Union liking to make things difficult for American technology companies it sees as too dominant, etc., working on balkanizing the Internet.
So I think one should be careful in thinking that we’ve just ended up with iOS vs Android and which one is the best to go forth with. We got there through a evolution of technology and competition in the U.S. but now in a more global economy, there could be some seismic events that change the landscape. Will Huawei be content being Google’s handmaiden forever in terms of the Android OS, etc.
Given Microsoft’s past successes with hardware stuff in recent years, I doubt the Hololens is our future. But there is Magic Leap and Apple is said to be working on an augmented reality wearable. If someone came out with a really good AR glasses on the order of everyday glasses in size and weight, I’d probably go with that OS and whatever smartphone or wearable was made to use with that - and if that seems like a ridiculous premise, phones are now more powerful than computers 60 or 70 years ago that filled whole rooms and literally required tons of air conditioning to run.
So Android vs. iOS? I’m not so sure it will really matter in 10 or 20 years. There is going to be something else that goes beyond the smartphone and OS’s dedicated to a phone/tablet interface.