I understand your point for normal scenes with daylight brightness in a lighted room, the high brightness levels of today's TVs results in mediocre black levels looking OK. This is why LG sells to many IPS panel TVs for family room viewing. But, for dark scenes in a dark home theater room, deep black levels still rule. You will notice the grayish blacks and clouding of IPS panels and some wide viewing angle VA panels very easily in dark scenes. I'm 72 having had cataract surgery on both eyes, but am instantly aware of poor black levels in that type of content. Plus, as easily noticed with OLEDs, their "infinite black levels" make HDR highlights pop even at the reduced peak brightness of OLED panels. So the effect you mention applies in the opposite manner also. Going back to plasmas (I still own two of them), their relatively low brightness made deep blacks essential for their much heralded PQ. But none of this is an issue for the Q90T, which features both high brightness and very high contrast ratio with local dimming. It's too bad that DSE can screw the pooch though with any LCD.Back in the Days of the Pioneer KURO it was all about Black levels. Once you achieve black levels beyond Human eye and measurable on most Calibration meters owned by the general public, I think Black levels is not the major consideration in video today. There are so many things in Video that needs to be improved besides Black level.