AutoMotion Plus can be turned off. The panel itself will always upconvert to 1080p at 120hz, because that's what the panel is. So that minimal amount of processing will have to be done regardless. The AutoMotion Plus feature processes that image to reduce the judder and blur when the processing feature is turned on.
The additional judder settings is a customizable feature that adds more options to each input. Since every input is independent in the settings, one option to dejudder would be more relevant for say TV viewing than Blu-Ray inputs. But you get that option, and it's available if you want it.
The B series, that is 2009 series, are have improved features and additional detail settings that allow you to customize the picture more.
I am very close to purchasing a new Samsung television, probably a 6 series or 8 series.
I understand that the 120hz display on these series is always on, regardless of the Automotion Plus (AMP) setting being on or off, and that this reduces motion-blur. I also know that the AMP's function is to use interpolation to add an extra "predicted" frame between each existing one to give the smoothness effect or in other words "de-judder" the footage. On all the A series Samsungs the AMP settings seem to let you set the de-judder to off, low, med, and high which makes sense. On the new 2009 B series Tvs though they seem to let you customize two distinct setting of the AMP: de-judder and De-blur.
If the effect of the AMP is to de-judder the footage, then what is this additional de-blur setting? Is this setting actually affecting the 120hz display which de-blurs the footage anyway? If you turn it off, is the TV not displaying 120hz anymore? Also, since the 2008 samsungs or the ones that start with "A" (eg A650), don't have the ability to customize this de-blur option, does that mean they don't have this feature?
Help would be appreciated