Audi A5? I don't, it be nice to have one though, haha. Anyways, back on answering your question, it is somewhat marketing, it is the way Pioneer make their plasma panel, each pixel made up of cells and stuff. Take it as marketing hype or as realistic specs to your own taste, the picture quality explains it all. The past couple of generations of Pio's have those deep encased cells and stuff, so no big deal in my opinion, the only big deal to me is how good the picture looks, the bezel, and the inputs on the tv.
ps. a 50" Pioneer weighs almost the same as a 42" Panasonic, does that intrigue anybody?