I have to admit that I agree with the point that the OP is trying to get at.
Judging from the 1000's of posts of very knowledgable people with regards to digital micro displays and the quality they are getting on them, I firmly believe that I just have not had the good fortune of being able to find a digital display set up properly.
Living in NQ it's a joke to try and find something even remotely set up properly, but I still can't shake the fact that every single plasma I have seen, regardless of the source, exhibits the same sort of motion artifacts.
I'm almost positive that it is to do with the internal digital processing capabilities of these displays which is causing the problems (scaling/deinterlacing).
I viewed both the Panasonic PV500A and the new Pioneer 506 side by side at our local HN, and to be honest, I wouldn't have bought either of them. They were definitely better than most of the plasmas on display, but they were far from what I'm used to with computer LCD's and direct view CRT's.
I'd really love to be able to hook up a HTPC to one of the current range HD plasma's, and feed them a perfectly weave deinterlaced, computer scaled 1080i, digital video based source (like the above mention Prison Break) at the panels native resolution and see if the same sort of motion artifacting occurs. I definitely don't see it when viewing HD material on my 1280x1024 19" Samsung LCD, but then again, the computer is acting as the digital processor (7800GTX with Purevideo).
*shrug*
Plasma guys: for some of us that don't have access to a well setup display model, it's really really really hard for us to get excited about these new generation digital displays.
I'm certain that it has to be the onboard processing causing these artifacts. My parents had purchased a while ago a Gundig 76cm widescreen crt, which exhibited the same type of artifacts. They were excited about the image quality of it, but to me, it was absolutely horrible with noticable aliasing and mosquito noise. It wasn't until I dug through the manual and realised it had features to "pause" (still grab) the tv and do some tricky stretching of the aspect ratio. Armed with the theory that the tv had some sort of digital filter between the source signal and the output, I got service menu codes, and managed to turn off the digital "enhancements" of the set, low and behold, the picture became about 10x better, and was actually worthy of their earlier praise.
Sorry for the long winded post, but researching why their expensive TV had such an absolute **** picture is what got me started on this trek, and in the last 12 months have got very sucked into the pro's and con's of all the emerging digital display technologies to find an answer to my question of "why do digital displays inherently display far more artifacts than normal computer LCD screens and CRT's"