Serialmike and Bobear, good points.
If the information for yellow is there, then the Quattron can apply it to a dedicated yellow subpixel instead of "dithering" with red-green. As in print, the less dithering the better.
As for sharpness, that's really contrast, which of course can be increased to give the appearance of greater resolution. Just as the line doubler on my old Toshiba gives the picture a subjective HD look. I guess "subjective" is the key word. If the Quattron makes the picture look better, then how it does it isn't so important.
Even "look better" leaves me skeptical. Do you think Best Buy, Costco, etc. give all the screens a level playing field, or do they tweak the ones they want to move?
I guess that leaves the professional reviewers. And though I don't doubt their honesty, I've often found what they say and what I see when I get it home are quite different. Of course, this may be because any toy I pay multi-large for, like a trophy wife, as long as it puts out, I'm just gonna love.
Sony 55W905A, Dahquist DQ10 (x4), BW sub, McIntosh MC-2150/2200, OPPO BDP-105D