I don't think a watch will solve the problem that Apple's trying to solve with it. If anything, notifications on your wrist will probably be even more distracting than a phone in your pocket.
From my own experience - owning a Pebble - I find that the notifications aren't actually distracting. I'm able to completely put my phone away, which means I'm less tempted to Twitter/Facebook/HN apps, but comforted in that I'm able to see if anyone has called/texted me for an emergency.