How many iterations of Google Glass will be necessary before the gadget appeals to a mass consumer audience? Determined to find out, Google is showing off the second version of Glass -- which is
expected to roll out (in limited numbers) later this year. “On top of introducing a new mono earbud … Google said the hardware revision will also make Glass compatible with new lines of
sunglasses and prescription frames and [product testers] will have their choice of colors,” 9To5Google reports.
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