Patent shows potential controls for Google Glass

The control scheme isn't likely for Project Glass, because the patent shows a system where there is a projector built into a pair of glasses, but nothing about Project Glass has made note of a projector. But, the idea of seeing controls overlaid on something (like the user's arm) through the screen of the glasses is something that could be part of Google Glass. 

Combine the augmented reality overlay with some hand recognition in the camera software, and that could allow for something like touch interaction. And, that sort of interaction is part of the patent: “the processor may detect when the display hand is moving and interpret display hand movements as inputs to the virtual device.”

The patent also covers many smaller points of interaction, like displaying controls based on a gyroscope that detects when the head is moving, and stopping the controls display when the user drops their arm. 

source: USPTO via Ars Technica