Engadget - When I was a tiny tot, I watched Knight Rider and pretended I was Michael Knight, talking to KITT on my watch. Yet now that there are real-life watches that can do even more things, I don't find myself quite as excited as my 5-year-old self was. Smartwatches have been around for over a decade already (remember Microsoft SPOT?), but the category hasn't evolved at the same pace as smartphones. It's not because there's a shortage of digital wrist-worn timepieces. The problem is that there's no common platform for third-party apps, which means there's little potential for growth.