A vaudeville act with a laser light show is kind of like a covered wagon with a hybrid engine; it's anachronistic, paradoxical and probably not necessary. But clearly, necessity is not a factor when developing entertainment that revolves around single-wavelength radiation. Just ask all those Pink Floyd fans. They don't go 'cause they need to, they go 'cause it's cool to be able to visualize "Set the Controls for the Heart of the Sun," man. It's entertainment at its most visually stimulating. And visually... More >>>