There won’t be nearly as much compromise required for a conversion to 3D as are required for conversion to a different aspect ratio.
The kind of compromise we see in pan & scan totally changes the composition of a frame, which can distort the intent. (eg; characters shown at the extreme opposites of the frame, with a gulf between them – pan & scanned so that only one characer is shown at a time.)
The translation to 3D will not be lossy in this way - there should not really be a need to discard anything. At worst, a very small amount of information at one edge will be fudged out. Parallax shift will typically be quite small for pixels at left and right edges of the screen. The type of cropping that this will require won’t really affect the composition of the frame, it would only be a tiny slice off the margin. I would expect that the prints that they are working from will have enough leeway to cover this, so that no cropping is required at all.
You seem to be focusing on the cropping, but I meant that any change, no matter what it is, will be nit picked by someone who (maybe subconciously) has decided that the original content and format was perfect as is, thus prompting them to look for nits to pick. When they find these nits, hyperbole will result.
Pan & Scan was a compromise, and more or less, acceptable to the unwashed masses, but obviously not the avid film making connoisseur. I expect that 3D Star Wars would probably be acceptable to most folks looking to get entertained on mantinee weekend, but will offend the extreme hardcore Star Wars fans.
I wonder if after he finishes Lucas will declare that this was his original vision and and other versions of the film would never be seen again since he had to destroy all of the prints in order to make the 3d edition.
I’m planning on boycotting any 3-D release of “A Newer Hope”, but then sneaking in* for the “rollercoastering through the trenches of the Death Star” scene.
*(why, yes, with a fake beard and boobs, how did you know?)
It depends - one of the techniques used to reinforce the 3D illusion in Avatar was to subtle tracking of the camera. It would be possible to reproduce that as part of the conversion of a 2D film to 3D, but the starting point for the process would probably be a gentle pan of a cropped frame within the full filmed frame.