Filmmaker Chris Barrett wearing his Google Glass. He is among the first 1,000 nondeveloper testers of the product. Jennifer Rubinovitz/Courtesy of Chris Barrett hide caption

itoggle caption Jennifer Rubinovitz/Courtesy of Chris Barrett

A visitor at the "NEXT Berlin" conference tries out Google Glass on April 24 in Berlin. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images

Google co-founder Sergey Brin wears Google Glass glasses at an event on the University of California, San Francisco's Mission Bay campus on Feb. 20. Jeff Chiu/AP hide caption

itoggle caption Jeff Chiu/AP