More details and the whole KeyNote of Stephen Elop, Président de Microsoft Business Division here : http://www.trendsnow.net/trends_now_/2009/03/microsoft-sustainability.html

“The Virtual Wall provides a barrier made up of plasma laser beams depicting pedestrians doing what they do best and any car that crosses that barrier suffers the consequences. Okay so maybe those lasers aren’t powerful enough to do any harm but the effect is enough to make drivers and pedestrians alike follow crosswalk rules to the tee.”

Designer: Hanyoung Lee
via yankodesign.com