My wife has tried to get me to get a smartwatch but I wasn't sure what I'd do with one. I hadn't considered there were DIY options out there. This has me thinking of more projects I don't have time to do.
At this point, you have to really look at it and say actually, this'd be really good for robotics - esp32, add a motor shield, 6axis sensor, motion depth sensor, k210 with camera, wifi, BT, lipo capable, grove connector, all in one unit!