When it was announced that Panasonic bought the patents to the Kuro back in 2009 (no, it wasn't just a rumor if you do your research), it was then assumed by many that the next generation of Panasonic plasmas would essentially be a next-generation Kuro in a Panasonic housing. The Panasonic reps never stated that this would happen, but they did state when questions at award shows that their newer sets incorporate some of that Kuro technology into their panels. Although just exactly what that technology was, I'm not quite sure. I remember hearing this from the VT25 model all the way up to the final VT60/ZT60 line. Also, some of the old Pioneer engineers who developed the Kuro also worked on the later Panasonics. This was always good to know, but it didn't necessarily mean that they were basically cloning the Kuros as we all found out over the last few years of Panasonic's PDP production life.
I'm pretty sure there is no conspiracy that Hollywood forced Panasonic to not implement Kuro technology because it would harm theater sales. In fact, I'm going to say that's a pretty ridiculous theory. Panasonic didn't implement the technology in full because it was expensive and therefore not in their best interest in terms of creating more revenue. That's pretty simple.
Pioneer had achieved zero-black with their Extreme Contrast Concept, but it was only in its prototype stages. I remember one article that had a Pioneer rep stating that we'd have to wait for the 11G sets in order to see this technology implemented. Of course, that never happened either.
Now, all we can do is imagine about what could have been...