For the sticklers: These figures apply to scanning frames of a widescreen movie. Because Kane was shot in the days before widescreen (the aspect ratio—i.e., the ratio between width and height—is 1.37:1, as opposed to an HDTV screen's 1.78:1), there is less area to scan. So, in the case of Kane, 4K-scanning translates to 3,656 lines across and 2,660 lines down, or just under 10 million pixels. But by the same calculation, the older high-def scan of Kane amounted to somewhat fewer than 400,000 pixels as well. The bottom line: the magnitude of difference between the two is about the same.