This thing is super cool. check it out here.
The Facadeprinter is a simple robot. It’́s purpose: printing huge artworks out of it’s box onto the walls. Based on a digital artwork software controlled motors are placing an airpressure-marker to fire thousands of colorballs. So the artwork is growing dot by dot like the drawing of a magic pen. An inkjet-printer in architectonical dimensions.
Sadly, you can’t buy a facadeprinter, but you can hire them to do a print for you. It’s pretty expensive though.