Consider a watch much like a leash. One that tracks your every vital. It senses when you awake. Where you go. What you like. What location you visit. What blood pressure you have. Your pulse. Your demeanor.
Is this any different than a cell phone? Or perhaps is this a new kind of leash that tracks you as a human.
Lots of absurd straw men in your list. . . and assumptions that are not true. Are you planning on shooting them down, or are they just rhetorical?
I’m sure that it has some useful features for some people, but I haven’t seen a killer app for it so far. The killer apps for my smartphone are navigation and nextbus.com.