Um, sort of. I think I understood that the whole spectrum would move, but I did not understand how a TV set would know that the frequencies that moved to a different location represent the same image. I suppose, the TV set "measures" it relative to the mid frequency and it can detect this mid frequency automatically, just like a wow & flutter tester can, if you have two sidebands, just measure the full difference from left sideband to right sideband and divide by half. But the right sideband is cut off, so I am not sure how this works.
Anyway, I think I know enough to be able to read the charts and to make some conclusions, like you can have the most detail at the brightness close to the max, and without color it would be even higher.
BTW, I've heard that analog TV signal used to have a "flag" that indicated a program as color or B&W. Was it widely used? If a VCR was connected to HF antenna cable, it was able to receive this flag. Did VCRs act upon it? Did they omit recording chrominance? Is this flag sent over composite/SVideo?