“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.