The market for wearable gadgets will reach about $1.8 billion within the next four years, according to Juniper Research, a firm that specializes in mobile telecommunications. Trouble is, it's hard to wear a gadget without looking like you're wearing a gadget. Plastic or silicone fitness monitors, such as the Fitbit and Nike Fuelband, practically scream "activity tracker!" And smart watches are large, heavy, and obvious-the calculator watches of the 21st century.
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