Nanomarkets posted an interesting article discussing what a low-growth world means for OLED lighting. They say that while OLEDs has been touted as a high-efficiency lighting technology, this feature alone will not be enough to gain real market share in the lighting industry as the developed world is experience difficult financial times.
There are still technology challenges that needs to be overcome, and companies need to commit to mass production before OLED lighting will begin to sale in meaningful quantities. Nanomarkets also laments the lack of industry leadership - they hoped that GE will be the leader, but it seems that their solution-processable OLED approach is not advancing as everybody hoped, and other companies aren't talking about mass production yet. It seems clear that it'll take at least 3-4 years for the OLED lighting market to actually emerge.