My understanding is that the quantum dot enhancer does not replace the RGB color filters of a conventional LCD...it enables a "richer" white backlight...that when filtered down produces a broader gamut of reds and greens.
I would say cleaver use to words with 'zero change in thickness'. The QD's variation in size can act as a color filter but for a homogeneous filtering the size should be nearly same. We can for sure increase the color range but what about the color sharpness? The early adoption of this technology will depend on the marketability.