[your_drunk_dad]

Comparing Apple Watch to Mi Band makes no sense. Apple Watch is more of a microcomputer than a cheap smart band. It would be better to compare it to something like Garmin Fenix 7X that lasts you almost 40 days with 120 hours in GPS mode and does much more than a Mi Band.

[10u152]

Calling it a "microcomputer" is meaningless.

What is it doing? Monitoring some sensors, communicating with a phone via bluetooth, running a screen.

[your_drunk_dad]

It's miniaturized iPhone as it can be used without phone to make calls, receive messages, stream music etc. as it has e-SIM capabilities. It runs Game Boy Color games which is pretty cool even if not very useful.