Bangle is a good one https://banglejs.com/ Quite fun to work with. I got one from a conference, and my kid has been enjoying it a lot.
When your watch supports the most common computer language on Earth, it is hard to go wrong with it. 4 week standby is pretty good too.
Bangle doesn't have standalone wifi...
Wonder if you could get Clojure (through the SCI) running on it.
How is the general watch API? The development experience?
is there some community or list of exciting projects made for it? for inspiration :)