@Eddy Ito ... YMMV
I've seen a lot of people with them.
Where it comes in handy... at airports when you need to go through the TSA pre line or when you board the plane. (US issue) There's an app that has the flight detailed Q Code now visible on the watch face.
It does tell time (as accurate as the phone and the network)
It does work well as an alarm for meetings.
It does work well for those who want to screen their calls because their over sized cell phone is too hard to get out of their pocket / purse/ murse/ or backpack.
Its also a status symbol to some who don't understand why some men where mechanical watches...
Personally, I think the next watch I'll get is a CS clock that I can wear as a pocket watch and charge every night. Then I can become a walking ground station for GPS fixes. ;-)