I took this snapshot of a b/w set using a CBS color converter at the last ETF convention.
As Steve noted, a still photo basically shows you what there is to see. An average person walking by will say, "Hmm, that's a nice looking color TV."
To me, the only difference from a conventional picture was some flickering. Perhaps that's more evident to some people than others, like the strobing from fluorescent lights.
This converter uses a magnifying lens, so some of the reflections & whatnot in the snapshot result from that.
As with all TV shots, the only way to get a true depiction of the screen image is to turn down the room lights somewhat. My memory is that this screen looked deeper and less washed-out than it appears in this snapshot.
Phil Nelson