I know some people are skeptical that wearables will be a big deal, but I believe in the potential of these fitness applications. No one has really cracked the right UI and funcitonality yet-- but when/if someone does, we could have devices that not only track exercises but also help you to monitor your health in more meaningful ways (e.g. catching problems or irregularities before they escalate). In coming years, I won't be surprised if we have wearable products that produce measurable health benefits, such as owners who live longer, or who are less likely to develop condition X or Y. Like I said, we're not there yet, and there won't be a healthcare revolution if these devices just track steps, count calaries and sync to phones. But the potential is there. I am much more intrigued by this sort of thing that stuff like Google Glass.