We didn't run into this wall of light until the end of a very long day at Maker Faire. But as we stumbled away from the "Battleship" arena back to the main exhibition hall, hot and tired and hungry but determined to make one last effort at finding a section of the Faire we had missed, we went "through" a mostly-dark building. There were a number of amazing light displays. I'd love to have a wall of light like this!
(In fact, one of the first techno projects we stopped to look at was a small cube made of lights. It was a kit, but you had to solder it together. And then you needed to buy the circuit board separately. And then you needed to be able to program it. Okay... "kit" was a bit of a misnomer. But it was one of the things we wanted to have of our own!)