This is definitely encouraging and has the feel of a potential $1k street price come 4q2013. With a decent anti-reflective coating, it would be an incredible value offering.
I read an article in a recent home theater periodical that the korean CEs are now betting more on 4k than oled, which candidly has some historical logic behind it. If 4k is the next 3d or smart platform to drive new tv sales, then i believe plasma may survive beyond 2014 as the purists' choice. While LCDs have improved dramatically in the past four years, they have still yet to conquer viewng angles. Throw in black levels, screen uniformity, contrast levels, motion, and a price advantage over high end lcds, and i feel like you have a value proposition for a niche audience that pays for perceived quality.