lurker77 said:
The next best thing that can be done is something that the article touches on - oversampling. Simply, if you use a 12 megapixel digital camera to capture a 4K image, it will turn out almost as good as a 3-chip scanner. Today's DSLRs do 12 megapixels.
EDIT: My mistake. 12 megapixels is not the same thing as 12,000 pixels per line. That would be 48 megapixels, beyond what any off-the-shelf camera can do ATM.
Even 12 megapixels seems like overkill for this project. A typical 1.85:1 35mm release print (a 3rd generation copy of the camera negative) has roughly 1000 lines per picture height (examining the print directly)... so that works out to about 88 lines per mm.
Since the Anamorphic Projection Aperture dimensions are 20.96 x 17.53 mm, that works out to about 1844 x 1542... or about 3 megapixels.