Here's a quote about one of Samsung's own in reference to a possible 50" OLED set to be shown at CES(and also noted that if they were to release a model today it would likely cost 10 times the price of a comparable plasma/LCD):
"Kim then shifts into sales-mode by pointing out that Samsung's more power-efficient 240Hz LCDs and Plasmas with highly-reflective black panels and LED edge-lighting are quickly cutting into any advantage offered by OLEDs -- including thinness if you factor in the additional electronics you'd have to slap onto the back of those 3-mm thick OLED panels to create a TV."
Having said that, plasma and LCD are improving despite what some believe. People were amazed with SED when it first came out mainly because of the black levels which (at least with the Pioneers) is becoming a non-issue. Once plasmas get brighter (and reduce the ABL) and LCDs can deliver deep blacks on average scenes (LED models are getting there), then contrast will become a non-issue. And IMO by the time a reasonable sized SED or OLED TV comes to the marked that plasma/LCD will all ready be there, be significantly cheaper, and come in larger sizes.
Everyone gets so hyped up over all the new technology coming out but the advantages of new technology like OLED and SED gets smaller and smaller as plasma/LCD keep improving and getting cheaper. Let me know about this when we are getting close to getting at minimum a 60" screen for no more than $7k MSRP. I'm just not one of those guys that wants to bash todays technology for new technology may not be readily available for another 5 years. I don't know about you guys buy I'm not getting any younger.