Created by the MIT Media Lab, Glassified is a ruler with a transparent display that adds virtual graphics to actual pen strokes.
Jinha Lee has designed an "augmented online shopping mall" that could enable people to see what items would look like when worn.
The display space can now be a layered experience of video media and real-life objects.
The super thin display can be controlled by ultrasonic waves to show flat and 3D images.
A patent application shows a transparent display screen that would allow users to control applications with hand gestures and head movements, see 3D content.