I know what you're thinking. How in the world is there a keyboard that works with Google Glass?
Well, there is, and because Google Glass is still relatively young, the keyboard isn't exactly the easiest thing to use.
The technology uses Google Glass' touch pad, motion sensor and camera to let you click and swipe on the side of the gadget. The other typing option uses head gestures.
Just note that the last part of the video shows technology that isn't yet available - typing on your arm, and eye tracking. It's just a look into what's coming.