Dell is showing a nice new OLED laptop prototype - a Studio XPS 16 with a 2mm thick OLED display. Dell says that comparing to the LCD display, the OLED is faster and uses less power. It also has a higher contrast ratio of 10,000:1.
Dell says that this is just concept, they didn't mention how close their are to actually releasing an OLED laptop. Dell's CEO has hinted at OLED laptops back in 2008. It's likely that Samsung produced the OLED display prototype for Dell.