Based on the reviews I've seen so far, this year's models are significantly better. They are also cheaper - the P60ST60 retails at 1699, and you can find it for less if you look around (I think Sears is $1499 but scarce availabilty right now).
I picked up the P60ST60 on Tuesday and I am absolutely blown away so far. Granted my old TV (52" Sony KDL-W5100) was outmoded tech, but I am seeing clear and massive improvements in blacks, shading, crispness and color. I paid retail at Best Buy and don't regret a single penny of it.