The MIT Mobile Experience lab has just developed this ambitious interactive installation called The Cloud. Located in Firenze, Italy, The Cloud is a sort of sculpture with over 15,000 LEDs and several miles of fiber optics. The tips of the fibers glow, but they also change colors in response to human interaction, including touching it or standing near it. The Cloud uses a combination of proximity and touch sensors to achieve this. It also has two cameras and a microphone, which allows it draw input from various sources and output a much richer, more organic response.
[via Cool Hunting]