[1] is definitely cool, and similar, though done at a much smaller scale. The Hoover Dam looks to be about 10 times as wide and ~5 times as high as that building. So you're talking about 50 times the surface area to project on. Projecting onto a perfectly flat and perfectly rectangular basketball court is hardly the same challenge though.

Whether the technology is revolutionary or not, my point was that it's rather dismissive to call this "a very large billboard". There's definitely some cool artistic features to the presentation that are not in any way representative of a billboard.