OLED displays for handheld devices have been around for a while, but large TVs have been rare due to manufacturing difficulties. LG group has been one of the few manufacturers. At the end of October, Panasonic has introduced a 65 inch 4K ultrahigh definition TV in Europe. It combines LG's OLED panel with Panasonic's image processing technology.
Despite a high price of 10,000€, the TVs are selling well. If in the past the rule was that your display can never be too bright, now the rule is that your display's gamut is never too big.