Google glass, Sergey Brin, and the greatest show on earth

Since we already saw Google Glass--Google's augmented reality glasses project--back in April, Sergey Brin had to think big to keep us excited about the pet project at today's Google I/O keynote. Brin didn't disappoint: rather than rehash what Google Glass is, he demonstrated "why" it is--with the most PT-Barnum-Greatest...

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