Well, it's basically what I said. As far as I know, there is no recording medium that can record more than about 1024:1 in contrast ratio, consumer video cameras are at best 32:1 (5 stops on the aperture), professional video cameras somewhere in between. On either side of that scale, there would just be pure black and pure white, no details
I also doubt that broadcasting standards allow showing a contrast rate as high as 20 000:1.
So unless there are video games that have 20 000:1 contrast range, I can't fathom why you would need a television set capable of showing that kind of dynamic range. I either smell a marketing ploy or they've just created technology that no one really needs....