I absolutely hate Apple watch. I don't like the design and there nothing breakthrough technology inside it. However, I pre-ordered one just to see if its any use for me. Without trying by myself, I can't say its useless. There might be some use for it. For example. when I am riding bike, its inconvenient to look my phone for directions. Watch might be helpful there. Such small things make difference.
When iPhone first came out in 2007, everyone was criticizing it saying no one wants a phone without physical keyboard. Now none of the phone have physical keyboard. I think ultimately in next decade we will get rid of cell phone and everyone will have wearable in place of phones.