You dont know much about broadcast do you?
We may be on the brink of HD but its still analog 90% of the time,
You know about blackburts boxes? The RBG parade?
I mean yes with NTSC (never the same color) televisions people have all sorts of wacky color schemes. But if you want the whites to come out as static or the blacks to bleed and pulsate then of course deep blacks and whites have no place in broadcast.
Without a deep black or bright white, there is no TV. Bright white on a TV is not true white (true white is static) and pure black is not pure black because that would be the CRT turned off...
If you do any sort of DV, and I do, you have to keep a CRT because moving from my computer, burning to DVD, and watching on TV, i want the colors to match well and I want my gradients to look good. If i edited with FCP on an LCD Im not getting an exact representation of the color scales.