Your iPhone or Zune HD has nothing on this. It’s the Ring Wall, the world’s largest touchscreen interface. It was designed by Sensory Minds, and it’s sitting real pretty in Nuremberg, Germany.
“World’s largest,” eh? It’s 45m long, using a cool (more, actually) 34.5 million pixels in the process. Fifteen high-definition projectors are also involved.
It’s multi-touch, too, but it’s one thing to zoom in on a photo on your iPhone. On a giant screen like this? It’s more so that multiple people can use it simultaneously.
It’s primarily used right now to display information related to the world-famous Nürburgring, which I’ve driven on many, many times… in GRiD and Forza Motorsport 3.