kanpol13,

I'm not sure why the white-screen was removed (I believe that's true) or the Blue Only calibration screen was removed, but I do know that the new 4-Series plasmas will be 3-D ready, and it will also have the 600Hz Subfield Motion panel, which is a panel that has more responsive phosphors, so there are some significant changes from last year's models.

Hope that helps.

--HDTech