Cool stuff. The yellow component is meant to help show colours like golds and cyans much more clearly and vibrantly, RGB (despite common misconception) isn't all powerful and can't display the full range of the colour gamut. Yellow helps extend that a fair bit
Also uses less power overall because the light can be let through more easily, thus a less powerful backlight is needed.
Certainly looks like a good setup, I too would like something like that one day when I'm actually in my own house for any long period of time and when I'm actually settled down and earning a decent wage!
PhD first though