We have had a Samsung Gear II watch for several months now. I was the one using it to begin with, but it turns out that it is more helpful to my wife. Once you pair it with your Samsung phone, you can answer calls without digging your phone out. You can also read your texts etc. inconspicuously. It has a whole host of useful functions and features. It actually is more useful than one would tend to imagine. I am sure that the Apple watch adds similar function to the iPhone.
What should happen next is, Samsung should make their watch fully compatible with the iPhone and software-upgradeable at 2/3 the price, not counting precious metal content.