I enjoy wearing my Pebble watch as it stops me from getting my phone out of my pocket (and getting distracted by other apps) when a notification comes in. I keep my notifications under control in the first place, so only stuff I'm actually interested in seeing makes a buzz on my wrist. Yes, a few of those are phone calls — but even the ability to see who's calling and hang up if I don't want to talk to them can sometimes be useful.