I'd like a watch that can show e-mails, take calls/texts, run basic apps like WhatsApp and a VOIP client and do voice assistant tasks, one that doesn't need to be tethered to an iphone or even need an iphone. I'm not a huge phone user, I mostly use a PC, so such a watch would be great for me. If it had a webinterface or a way to run all current android apps that need a full display that would be better too.

Looking further on into the future, I'd like a wristband phone, with a foldout flexible OLED display. Normally it would be an inch wide and would display basic info. But then you can slide out a 6" flexi display across your arm and use it for full on use. Or it has a built in projector (a good one, as current micro-projectors are useless).

But the tech for this is a while off yet considering processing, display, power and comm requirements. But I could see such wristbands replacing a large segment of phone users in 20 years if they are any good.

A company called Cicret were going to release a phone bracelet that projected onto your arm, but it was a total scam because we won't have the tech for it for years yet, Captain Disillusion did a great video on it (atm battery life would suck, the processing power means the interface will be barely functional, and the projection is so dim and distorted as to be unreadable). But in 20 years perhaps it'll be do-able.

As far as "real" phones, who knows. I guess the problem with a watch/wrist phone, is it's hard to disconnect them and use them as GPS