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...
Khosla is one of the planet's largest investor in biofuels. He has engaged in rather disheartening attacks on any plan that suggests electrons can replace liquid carbons molecules. See his recent statements on how plug in hybrids will forever be "toys."
He may very well be right in some instances, but given the vitriol he has spilled against alternatives to his investments, it's hard to trust his statements as honest assessments.
Gore, on the other hand, has been even handed in suggesting there is no silver bullet to our energy and climate crises.
All that being said, PV cost and efficiency has historically been closer to Khosla's estimate than it has been to Gore's. But that has been mostly as a function of investment. Now that billions upon billions are being invested in the space, I think we'll see the cost curve start to look more attractive.
The relative importance of files depends on their cost in terms of the human effort needed to regenerate them. -- T.A. Dolotta