few points. samsung is obviously putting more marketing money into their LCDs and LED backlit LCDs, but they're still doing a reasonable amount of marketing for their plasmas. Even in the latest generation the feedback i hear is that Samsung is superior to Panasonic in terms of colour reproduction, while not being as good in black levels, so it's facetious to say that only panasonic is pushing the technology. On most international forums as well, there is a larger preference for Samsung plasmas due to their superior colour reproduction. But whichever you prefer, panasonic or samsung, their plasmas offer better picture, and better value than comparable LCDs.
Both panasonic and samsung have come out with models with much reduced power consumption as well.
And yes, the LED backlit LCDs have an advantage in dynamic contrast ratio, and I am sure you will also agree that dynamic contrast is utterly bogus.
Again I am not suggesting that Plasma will be a volume mover, but in terms of absolute quality they still have the edge on LCD at most price price points. I've even read about the comparison between the local dimming LED backlit LCDs and the best plasmas around, and while the local dimming LED LCDs do achieve dead black in some areas, in terms of pure picture quality I understand the Pioneer Elite Kuros edge them out.
Of course it is tragic that Pioneer has pulled out, but I am fairly sure that Panasonic and Samsung will do enough to keep the slight performance edge they have over LCDs in the near to medium term.