@tom @TechConnectify Well those existed in Europe, too, but were rare. They did exist in rear-projection TVs and some cinemas had it to be able to show OKish TV shows. When TV shows started to have back-projection video in the 1990s, they sometimes used a stack of 2 or more of those to get an acceptable brightness. I think I've seen one of those at a school, and they were apparently popular with banks for their boardrooms.