TouchLight is an imaging touch screen and 3D display for gesture-based interaction.
[1] It was developed by Microsoft Research employee Andrew D. Wilson and made known to the public in late 2005.
[3] The TouchLight can both record and project simultaneously, and due to its 3D capabilities can be used almost as a mirror.
This same principle could be applied to link two TouchLights together allowing two people anywhere in the world to communicate with each other as if they were sitting on opposite sides of the same desk.
The user of the TouchLight can manipulate the size, position and orientation of the image by performing the corresponding action with his or her hands.