Read this: http://www.ipctechnology.com/support/techinfo/color_gamut.htm
In this context, the NTSC colour gamut refers to more than just what the "Never The Same Colour" TV standard could achieve. By this measure, the display that achieves 36% of the NTSC gamut is about 1/2 as good as a CRT display of old (not an NTSC CRT specifically, just an RGB CRT, presumably).
How does the reflectivity and contrast numbers stack up against the first gen eInk screens that lead to the Pearl devices we are currently used to I wonder ? That would have been an interesting comparison.