LG is finally ready to sell the OLED 4K TVs it revealed in January, including the first ever flat models. The Korean company has invested huge sums in OLED tech, believing that consumers will be drawn in by the improved black levels, better off-axis viewing angles and more saturated colors. We're pleasantly surprised to learn that the two flat UltraHD models (in 65- and 55-inch sizes) also have HDR capability with improved color range -- provided you have content that supports it. If you're more into curved 4K OLEDs, there's a new 55-inch model, bringing the total number of LG OLED 4K TVs to nine.