Researchers from Samsung Electronics created the world's first Quantum-Dots based full-color display (QLED). Samsung produced a 4" 320×240 Active-Matrix QLED made on both glass and flexible plastic.
QLED display promise to be more efficient than LCDs and OLEDs, and be cheaper to make (Samsung estimates that they will cost less than half of what it costs to make LCDs or OLED panels) - but as of today, QLEDs are less efficient than OLEDs, and also offer about 10,000 lifetime hours at best. It is estimated that it will take at least 3 years to commercialize QLEDs - and obviously by then OLEDs will improve a lot, too.
If you want to learn more about Quantum-Dots, check out our 2009 interview with QD Vision's CTO.