Last year Oculus VR unveiled their 3rd-gen VR HMD development, named Crescent Bay. This HMD adopts an OLED display - but the company now reveals that it actually packs two displays, one for each eye.
Oculus adopted a low-persistence AMOLED display for their 2nd-Gen VR HMD - and it was later discovered that it is the same Super AMOLED display used in the Galaxy Note 3 (complete with the touch layer and all). It was a Full-HD display, which means 1920x1080 - for both eyes. The crescent cove uses two displays, and resolution per eye is probably a lot higher.
Oculus is collaborating with Samsung, and it's likely that the new display is made by Samsung as well (which is the largest AMOLED producer by far, so it makes sense in any case).