The Pebble is the Kickstarter-famous swartwatch that serves as a second screen for your iPhone. (It's hardly the only watch of this kind: the Sony SmartWatch and Cookoo are other examples.) The Verge has a review that includes this interesting bit:
Any incoming notification will quietly buzz the Pebble and light up the screen. Frankly, it’s great — being able to see who’s texting, emailing, or calling you without looking at your phone changes the entire dynamic of being connected. The upside is obvious: only reaching for your phone when it’s something important means you reach for your phone much less often. (I particularly enjoy screening calls from my wrist.) The downside is that it’s harder to simply ignore your phone and let messages stack up while you focus on something else; having the Pebble buzz your wrist for every email and text means you’re hyper-aware of your inbox at all times. Some filters and priority settings would go a long way — having a Pebble changes the contours of distraction, but doesn’t reduce it. But once you’re used to having notifications on your wrist, it’s hard to live without them. [emphasis added]
All too often, new technologies just change "the contours of distraction" rather than push them back.