When I was kid there was a crappy cartoon on the teev named Dick Tracy. Dick Tracy owned a watch with a built in radio. He would hold his wrist to the corner of his mouth and say in a butch masculine voice things like "Dick Tracy calling Joe Jitsu, Dick Tracy calling Joe Jitsu, come in Joe Jitsu" It was sort of the limit of cartoon imagination based on then current technology. All radios glowed in the dark and could be used as room heaters thanks to their rows of thermionic valves.
The pox video we have all just watched (ha ha ha ha ha ha) shows our creepy hero(?) videoing the socially challenged (blank? stupid? naïve? dumb as a sack of hammers?) woman skiing down a hill and on the replay she is perfectly centred, even though the dork filming her is also moving. One question, how is it possible? This is a camera on his wrist, not a steady cam.
I am a member of The Old Farts Club and one of the rules for entry along with aching joints, encroaching deafness and pointless tales about the Good Old Days, is that you have to be Vision Challenged. Reading some things on my HTC One requires that I put on my glasses. Reading the installation key from a Microsoft COA also requires reaching for a magnifying glass. Trying to read a web site on a postage stamp, even a commemorative sized postage stamp will be an exercise in pure futility.
And all of the other crap. Battery life? Multitasking? Cut and Paste? Repositioning the cursor in a block of text? Storage? Usefulness? Ya boo sucks.
Companies continue to do things with wrist watches and people continue to stay away. As already pointed out, a solution looking for a problem.