Google CEO Sergey Brin speaks at Google I/O 2012 Conference

Sergey Brin, CEO and co-founder of Google, wears a Google Glass during a product demonstration during Google I/O 2012 at Moscone Center in San Francisco, California June 27, 2012. REUTERS/Stephen Lam (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY) - RTR348TW