“A wave of companies, many of them start-ups, is creating wearable electronic tracking devices for nearly every part of the human body, from brainwave-monitoring headbands to smart socks. Retail revenue from wearable technology is predicted to reach $19 billion by 2018, according to a new study from Juniper Research.”
Inc has a gallery of wearable technology including some in the graph below from its magazine (sub required)
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