Sony has just announced a new attachable display module that can turn a "pair of fashionable glasses, goggles, sunglasses, or other type of eyewear" into smartglasses. And, yes, it's completely detachable so you can remove it whenever you want to. This module is comprised of a control board where the Bluetooth and WiFi sensors, processor and other components live, along with a 640x400 OLED microdisplay that serves as your screen. The company sees a long list of potential applications for sports, work and entertainment, so it plans to provide "partner organizations" with an SDK.

http://www.engadget.com/2014/12/17/s...isplay-module/