I agree with Mike but I've given up expecting filmic transfers, where images truly look like celluloid, especially since every vid company under the sun is dedicated to mimicing the look of CC transfers.
Go into a cinema: films never look as icy sharp as Criterion's restorations. This is one of the reason's I'm determined to stick as long as possible to 27-plus inch, hi-rez dedicated tube screens (Multi Video Labs being a good hi-end product), which duplicate the cinematic "warmth" that flatscreens cannot at present recreate.
You cannot repaint a painting if it has faded over the centuries-- you set out to preserving it the best you can. I know there are some open air ceilings & frescoes where artists go in and actually paint over the old fresco rather than let it disappear before the public. If an old piece of pottery is broken you cannot stick the remaining antique piece into the oven with wet ceramic to create a brand new one. If a precious sculpture gets badly chipped you don't fill in the chip with new materials.
Some digital treatment is obviously fine, as well as wet-gate processing in telecine to fill in some scratches and deal with additional interferences on the surface. Edge enhancement has become so common however that the warmth and rich substance of film is rapidly disappearing, and reviewers complain when taking the measure of a DVD that there are scuffs, scratches, speckling, and audio pops & clicks... on films which are over 50, 60, 70 , even 80 years old! Criterion has a stated goal of
reproducing the original viewing experience, i e getting films back to their original state of flawnessness. Certainly viewing films back then as well as now-- especially then, when 35mm negs were blown up 3 stories tall (and bigger!) in the old movie palaces-- provided far softer edges and a hell of a lot more grain than the hypersharp dvd's we watch from CC. It seems in some cases we're better off resigning ourselves to the fact that we'll never duplicate that original experience in certain cases owing to deteriorated elements, and stop fucking with the natural image which is like spraypainting over an antique.
I think a miraculous looking CC dvd is L'ECLISSE. Such a fine dvd-- such a filmic looking image. Certainly the closer to 10/mb per second we get, the more of a chance we have to seeing images like that. otherwise the images thin out and lose that certain richness, that fluid substance that celluloid has. Color accuracy aside, here's a very filmic looking CC frame, from RIVER.:
This also is a super-filmic image:
Both images have that certain something, very fluid & rich softness of celluloid, that few DVD's (including CC) attain. There are moments in CHUTE DE LA MAISON USHER when the bitrate hovers around 10, especially in the very beginning where the old friend is shivering in the outdoors by the puddle. It's a richness that's not always easy to find. I'm not one of these purists (I think there's a co from Germany which released ENTHUSIAZM by Vertov, and they believe its sacrilege or something to do anything to a piece of old celluloid) who believes all digital manipulation is some kind of sin. But there is a line, somewhere. Rather than draw it I'd say it's on a film by film basis.