Shane Walker uses Google Glass while driving. His favorite feature is the ability to record his trips and send them to friends. Aarti Shahani/KQED hide caption

Cecilia Abadie wears her Google Glass as she talks with her attorney outside traffic court in December. A California Highway Patrol officer gave Abadie two citations in October; she was cleared of both infractions Thursday. Lenny Ignelzi/AP hide caption

A California driver who received a ticket for wearing a Google Glass headset this week says the existing laws are unclear. Frederic J. Brown/AFP/Getty Images hide caption

Alex Blaszczuk used Google Glass to shoot this self portait. Courtesy of Alex Blaszczuk hide caption

Parliament member Stella Creasy (second from right) and activist Caroline Criado-Perez (right) pose with a mock-up of the new 10-pound banknote featuring Jane Austen. Getty Images hide caption

Stephen Balaban has re-engineered his Google Glass to allow for facial recognition. Courtesy of Stephen Balaban hide caption

Physicist and writer David Brin, in Xian, China. Courtesy of David Brin hide caption

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

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

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

This view from Google Glass shows the wearable technology's perspective. Selected applicants will be chosen via social media and given the opportunity to try them. Google hide caption