Welcome to the world of wearable computers. According to Forrester's Sarah Rotman Epps, in three years, wearables will be everywhere. “Wearables are proving their utility in numerous industries,” says Epps. “In the past year, consumer wearables such as the BodyMedia Armband and Nike+ FuelBand have proliferated in the health and fitness industries. This year, we’ll see wearables begin to break out of communication, health, and fitness to other verticals such as navigation, social networking, gaming, and commerce.” Here are some of the wearable products that you can buy now.