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pair of eyeglasses that allow the user to simultaneously view data about objects they are looking at. Sony's prototype glasses can display captions and information about programs a viewer is watching on TV.
Another offer was a bracelet made by Netatmo embedded with a sensor that looks like a jewel and which measures exposure to sunlight, helping the wearer decide when to put on sunscreen.
Even Qualcomm, one of the largest companies now touting the impending wearable device revolution and purveyor of the "Toq" smartwatch, acknowledges the hurdles ahead.
Raj Talluri, who oversees the design of its Snapdragon smartphone processors, wants to add the same chips to watches and apparel to let them handle much more sophisticated functions. But more work needs to be done on power consumption.
"The power consumption of processors really needs to get an order of magnitude less," Talluri said. "People's expectation in wearables is not that they have to charge them every day. They want to wear things for weeks."