So, the final cinema product being shipped to movie theaters is positive, or chrome type film, right? If so, that is the high volume portion of the film used after a motion picture has been shot, right? If so, this is a good thing, assuming that final positive film we see in the movie theater shares some characteristics with photographic film. ?
No, the final product is a positive produced by printing a negative onto negative film (in this case, specially designed for the release print, to carry both the image and the soundtrack), not a chrome. The motion picture industry doesn't use reversal films ("chromes", or diapositive films) in any capacity; they are and, except for a brief period just before, during and just after WWII when Kodachrome was king for documentary color, always have been strictly the domain of the "home movie" crowd. Even in 16 mm, only negative films are available in color, though you can get B&W reversal stocks; Super 8 and Standard 8 are the only motion picture formats that routinely use reversal film and they're used, even in indie filmmaking, only for special purposes (for instance, to insert a "home movie" internal to the story).