I think it complements your phone. So it is more convenient to glance at your wrist than rooting around in your pocket and getting your phone out, something som

I think it complements your phone. So it is more convenient to glance at your wrist than rooting around in your pocket and getting your phone out, something some people find quite rude. If the trends reversed and they shrunk phones (like they did in the 90s) and put a strap on them, then they could easily replace the watch. But then battery life would be abysmal.