Years ago when I did a course with Outward Bound, they asked students to leave their watches behind. The effect was to re-attune your sense of time to the daylight, and also to refocus your attention on the activities and not to be tracking the time so much. I'm supposing that was the intent; I didn't follow up and pin anyone down about it. It was an interesting experience in terms of its effect on ones thinking.
Warren, the Apple watch has some allure. I've never felt all that attracted to having "devices" with me continuously. I have a primitive cell phone and mostly leave it off, and have no laptops or tablets, though my wife does. I'm "run" by my computer and what phones I use to a degree that quells my appetite for more. I guess if you exercise control, the Apple watch might work. All of our devices are tracking us, which doesn't make me paranoid yet, since I don't feel coerced by it, but also doesn't make me happy.