This project by The Media Workshop LTD and Artichoke was part of Lumiere 2013, a four-day international light festival in Durham, UK last November.
“The public are able to tweet their favorite track and then that track is live VJ'd live on the side of the building. So Tim and Darren are frantically working being the scenes to pick all the graphics and colors that you can see to essentially make the building dance to the track that is playing.”
Looks like a pretty massive setup including 6x 20k projectors, 2x Retina Macbook Pros, VDMX, Quartz Composer, and a bunch of MIDI controllers and iPads. More information can be found on their vimeo page.