Charles wants to know the difference between QLED and OLED. Is QLED better? Leo says that it's more marketing. Samsung wants people to think that QLED is as good as OLED, but it's really just another LED technology with backlit LCDs. OLED is a better technology with bolder, more accurate colors and deeper, richer blacks. Is there a risk of burn-in? Leo says that modern OLEDs have solved that problem.