In January Oculus VR unveiled their latest HMD prototype, which adopted a low-persistence OLED display. Today Oculus started accepting pre-orders for the second-gen development kit (called DK2) - which adopts the new OLED. The DK2 costs $350 and will ship in July.
Oculus said that they chose the OLED because they really want a low persistence display. They say that "it’s incredible the difference low persistence makes... It’s mind-blowing". The OLED display runs at a high refresh rate - it switches in well under a millisecond - faster than any LCD monitor on the market. In fact, the company says that the OLED they use is much faster than any other OLED panel on the market.