Sony's expectation for the XEL-1 was never anything other than establishing brand recognition as the leaders in OLED. The truth is that while the display cost ~2500, the manufacturing costs probably were around ~5K as a function of the very lossy shadow mask technology they use for deposition of the organic material. The project was never sustainable, nor intended to be.
The technologies for manufacturing remain very immature, but the major display manufacturers, material developers and equipment vendors are investing major resources into solutions. A better bellweather for display technologies may be the Koreans (Samsung, LG) and the Taiwanese (AUO, etc). These folks are chasing the rabbit pretty hard.
There is also a Silicon Valley startup that is developing an interesting solution named Kateeva. Spun out of MIT, the company is developing a solution that marries the material advantages of evaporation with the simplified deposition approach of ink-jet. More information (and video!) at this recent article from Technology Review.
Disclosure: I do have an interest in Kateeva...
Doubt is a pain too lonely to know that faith is his twin brother. - Kahlil Gibran