Guided Collective together with techno DJ / producer Si Begg transformed Southbank with imagery and sound inspired by the new Tron Legacy film. This was apparently on behalf of client HP. I happened to discover the video by accident.
Begg re-edited parts of the Daft Punk soundtrack and the Guided Collective used digital projectors and lasers to put on the light show. The whole thing ran from November 26, 2010 to December 2, 2010. Some amazing pictures on this flickr account of the event.