Strange thought occured to me, so I thought I'd come here with it.
Has anyone ever used photoshop to slice apart the different colour channels of an image? If you haven't, well, it's self explanatory anyway. Viewing only the parts of the image that represent blue, in grayscale. Very interesting thing. Got me to thinking... What if we were to place two, different, monochrome images, in two different colour channels? The end result would look like gobbledigook, unless you put on some coloured lenses. Then, you'd be able to view one image at a time, while the other disappeared. Now, I realize at this point, it sounds a lot like the whole '3-d vision' thing we've had around since '50, but imagine two different video feeds on two different colourbands. Fullscreen, two player, competitive gaming, with no ability to see the other person's screen.