This Christmas, I was psyched to open a Nike Sportswatch and then I watched it sit on my nightstand as I fought the flu. Well, at least I lost weight! Seriously, I promise to use my new running partner once I return from CES, which leverages GPS to tell me how far I went and calories burned. This is just one of dozens and dozens of fitness gadgets spearheading the wearable devices market, set to grow from $800 million in 2012 to $1.5 billion by 2014. Between the Fitbit, Jawbone Up, Nike Fuelband and similar products, the wearable market is exploding. Right now, we’re also testing a bunch of wearable cameras that are great for outdoor fun, including the GoPro HERO3. At CES we’ll go hands-on with the Oculus Rift, a space-age virtual reality headset for gamers, and the I'm Watch, an Italian smart watch coming stateside that works with your smartphone to deliver calls, text messages, emails, and more to your wrist. The end of 2013 will see Google’s ambitious Project Glass head to developers so they can tap into its vast amount of potential. The goal is to essentially give users a lot of the functionality they’d expect from their smartphones — messaging, GPS, and the ability to share photos and videos — all without having to lift a finger. Rumor has it that Apple is working on its own heads-up display project as well, but details are scarce.