A. Its expensive for what it does.
My wife and I have been drawing messages to each other for the last 20 minutes. It's these fun, stupid things that make the watch really worth it.
Don't think of it as a productivity aid, even though it can be one. Think of it as a fun gadget that does lots of fun things. Calling someone with your watch? It's neat, and can be useful at times. Getting notifications, scanning email, and reading/replying to messages immediately? it's not really compelling, until you get to be dependent on it. Heart rate, music, etc? Sure, whatever.
I can turn my lights on/off and trigger the AC, pay for stuff, and book a round of golf.
It's a wrist swiss army knife.