Regarding Ghost in the Shell 2.0:
I didn't sit down and watch the entire movie, but a friend and I did skim through the Blu-ray recently. You've got three types of updated scenes in the 2.0 edition:
1) Full CG makeover. These sequences look terrible to me, but perhaps some folks will like them. The opening sequence is the big offender here; perhaps they break it out again for the crab fight finale, but I dunno. At any rate, I kept thinking I was watching video game FMV from the PS2 era.
2) "Hey, let's take the green and blue color palette of the original and turn it bright and gold here and there throughout the movie." Bleah.
3) "Hey, we can't afford to do much to these other sequences, but let's put a filter over them and blur things just a bit." Double bleah.
Again, opinions will vary but I was far, far from impressed by any of the changes in the 2.0 edition.
DVD Beaver has some NSFW comparison images that you may want to check out.
FnordChan