According to the Wall Street Journal and 9to5Google Google quietly released a new version of the Google Glass wearable-- an "Enterprise Edition" (aka "EE") designed for, well, enterprise.
As the news sources put it, the updated Glass has a tougher design to withstand any drops and bumps met on the workplace. The prism display is larger and more adjustable and, depending on who you ask, the device features either a button-and-hinge system for attachment to different glasses or "robust" hinges allowing wearers to fold it like a regular pair of glasses.
9to5Google describes the device as being "better fit in a factory or a hospital than on a runway… with a focus on function over fashion."
Further details include updated internals, including an Intel Atom processor, "moderately improved" battery life, wireless connectivity improvements and better heat management.