Wonderful World of Wearable Devices

The benefits offered by wearable devices seem limitless, and for many people, the devices are really chic. These wireless gadgets can track the number of steps people take each day; measure their heart rates, the number of calories they ate, or the amount of energy they expended; or access data by using cloud computing. "Wearables"--bracelets, rings, eyeglasses, necklaces, shoe clips, and more--en...