As the Apple Watch goes on sale Friday, it's unclear if the gadget and others like it can attain the utility and prominence smartphones have in the past eight years. Ryan Emberley/AP hide caption

itoggle caption Ryan Emberley/AP

Apple CEO Tim Cook speaks Sept. 9 during an event at the Flint Center for the Performing Arts in Cupertino, Calif., where he unveiled the Apple Watch. The device officially goes on sale Monday. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Isabelle Olsson, the lead designer of Google Glass, says she is encouraging more women to enter the tech industry — not just as designers, but in all capacities. AFP/AFP/Getty Images hide caption

itoggle caption AFP/AFP/Getty Images

The Microma watch was the first watch with a liquid crystal display, but the limited technology of the time prevented Intel from achieving much else with it. Courtesy of Intel hide caption

itoggle caption Courtesy of Intel