This has been mentioned before, kevinz. BTW, Welcome to the Booth.
Lest anyone think it's a new idea, read Joe Tawil's words from this article: Live Design: Joe Tawil.
Custom patterns had been around and there were off-the-shelf products made by both Kliegl and Century, basically radiator grills, cut into round cookies. It was something you did for television, because the large, plain backgrounds would undulate unless you put something back there, like a breakup pattern.