Rumor has it that Google is working on HUD glasses. The prototype reportedly looks a little like the Oakley Thumps, but with a single-eye lens display and most hardware comparable to what's found in a generation-old Android phone. It's unknown if this secret project will ever come out of the shadows.
Those new details were apparently provided by a "tipster" who got to see the prototype first hand. He claims the prototype "looks something like the Oakley Thumps," meaning a thick frame and possibly earbuds that swing down from the temples. The prototype features a system-on-a-chip, memory, and storage similar to what's found in "generation-old" Android phones. I assume a battery is in the mix, too.
Aside from the lens display (which is purportedly for a single eye only), 9to5Google says features of the Google glasses include a built-in camera, a flash, voice calling capabilities, and a control system that translates head movements into input. No, I'm not making this up. The site explains, "We are told it is very quick to learn and once the user is adept at navigation, it becomes second nature and almost indistinguishable to outside users." (The key word here is "almost.")