Note the giant color wheel? It's "time-multiplexing" the monochrome CRT by sequentially using it to provide the luminance value for the three primary colors. (Which exist as colored windows in the spinning wheel.) The setup here is similar to the CBS Field Sequential Color System proposed in 1949... and incidentally, similar to the system used in single-element DLP projection TVs.
And it's *totally awesome*. Bravo!
