Those effects have been perfected for a while. With high lumen HD projectors coming into their own at the same time it has created some amazing effects. I guess I'm just trying to say that if this interests you, there are a lot of videos out there that I think are a lot cooler.
This [1] is the first company I saw doing it. This [2] is their 10 year anniversary showcase. Now just about every NBA and NHL team incorporates them into their pre-game shows. [3] [4]
[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.
Oh yeah, I agree. I was mentioning them since your comment only mentioned the effects and not the practical aspects of the display. I just figured you might be interested in some other examples like the one you mentioned.
This [1] is the first company I saw doing it. This [2] is their 10 year anniversary showcase. Now just about every NBA and NHL team incorporates them into their pre-game shows. [3] [4]
[1] https://www.youtube.com/watch?v=Bu2e9uulMPA
[2] https://www.youtube.com/watch?v=_cuqbYbvYYM
[3] https://www.youtube.com/watch?v=17soGNnYyuk
[4] https://www.youtube.com/watch?v=FsZrywjPIb0