What I notice the most is two part. 1) motion in general, like you noted, a ball moving across the screen. 2) panning of the camera.
My Plasma looks terrific and I never notice blurring at all. My JVC however causes me some grief.
Some displays handle motion differently than others. I'm not real interested in Frame Manipulation technologies as I do not like the GI look it creates. Some displays do not need these processing methods, like DLP and Plasma.
One good example is when the camera (digital or film) pans and there is a sign in the background. With my JVC, I can tell there is a sign there, and I can tell the sign has words on it, but I can't make out the letters. When watching the same thing on my Plasma, I can tell exactly what the sign has written. When watching a football game and the camera follows a player running across the field, I can read the numbers on the players jersey when watching it on my Plasma, but it's tough to tell when watching on the JVC.
I have not seen the Panny 4000, but reports I've read indicate that it does not handle motion very well at all, whereas the 7000 does a very good job. If you are sensitive to motion like I am, it should be fairly easy to see a difference, I think.
Thanks for giving us your thoughts on this projector.
