The additional detail (as in resolution, not in the shadows and such) is not because of the BD, it's because of better compression and using lossless throughout the whole editing process. Even shots sourced from HDTV (and there's still quite a few) look a lot better in remastered.
Check out this shot (which comes from the same HDTV transfer used for v1.0):
If you click left, you'll see the v1.0 version.