IMAGINE WHAT GRAFFITI WILL BE WITH THIS: "SprayPrinter presents a new way to paint your walls"

It sounds cool. Just hope graffiti punks don't use it in a bad way. But then it sounds like it needs daylight to work,or not?

http://www.designboom.com/technology/sprayprinter-presents-new-way-to-paint-walls-10-30-2015/