OLED's had a brief launch a year or so ago...
I saw an OLED TV about 14months ago (in Currys) and they were awful.
The OLED screens have trouble with brightness levels (basically on or off plus flickering) and as a result the pictue quality was like watching a TV on a EGA graphics PC.
The colour pallet was so small there appeared to be on about 16 shades for RGB, and the sets didn't even do decent dithering effects. One picture showed a sky line, were the sky was clearly output in about 4 shades of blue with distinct bands from the deep blue at the top to pale blue near the horizon.
About the same time I saw this TV, I used some portable devices with OLED screens at work. They were not intented for displaying photo's or video, just colour graphics, as those devices only claimed to have 64K colours.