I saw it at CEDIA this year. Absolutely beautiful set. It was hooked up to a "BlueRay" player outputting 1080i. Very sharp and detailed, but smoother and more natural looking than DLP sets. Color was particularly good, and I did not see any of that waxen skin tones common to DLPs and some plasmas. The speed and processing of the set was also good and there were few obvious motion artifacts.
I could not really tell about black level and detail in dark scenes. The only preview material with dark scenes were a Spiderman II trailer. It was hard to tell if they monkeyed around with the gamma curves to make the blacks look good (at the expense of shadow detail), but it did appear to be reasonably good.
The only "problem" I saw is one that is common to all fixed pixel RPTVs, it is the sparkles (most evident in white or well lit areas of the scene) caused by the interaction of the pixels with the lenticular screen. On the Sony set, this was less of a problem than with most other sets, but it still was there.
My other concern was with the depth of the set. While it was not excessive for the size of the screen, I was hoping for something less than the 25" that the Sony rep. reported for the depth.
The short of this all is that it is easily the best RPTV I've ever seen, and I am planning to buy it.