Touch Vision Interface from Teehan+Lax Labs on Vimeo.
Music credit: Useless Information - Apparat
Touch Vision Interface enables touch interaction on many different connected surfaces through a mobile phones’ camera view. The translation of touch input coordinates to the captured video feed creates the illusion of being able to directly manipulate a distant surface. As a result, the interaction feels natural and almost invisible.
Writeup: teehanlax.com/labs/tvi/
(via YouTube)
(more articles http://www.inavateonthenet.net/article/44922/AR-tech-lets-you-control-billboards-from-your-phone.aspx)