I'm not familiar with the details of Samsung's technology. And certainly it is true that display manufacturers create wholesale fabrications of supposed technic

I'm not familiar with the details of Samsung's technology. And certainly it is true that display manufacturers create wholesale fabrications of supposed technical improvements in order to sell displays. But theoretically, adding additional dedicated colors to a display would increase the gamut (the field of colors a display can present, as represented by a gamut chart: http://www.pcmonitors.org/wp-content/uploads/2009/12/colour-gamut.jpg http://www.pcmonitors.org/wp-content/uploads/2009/12/colour-... ). In a perfect world, a red, green and blue color combination would be capable of presenting every possible color. This not being a perfect world, the presentation of color is limited, sometimes dramatically across displays and display manufacturers (if this were not the case, all displays would be perfectly equal, excepting white and black levels). Whether Samsung has implemented their yellow in a way that increases gamut is a separate question I cannot answer.