Additional comment -- I don't see why this scanner could not have been used in a scenario in which the customer's film was not "eaten by the machine". Some advantages would be the ability to archive the actual film somewhere, and, the ability to rescan it later on, as the technology improved.

Naturally, this would require a complete (B&W) develop-fix-wash cycle (rather than develop-scan-recover silver), but I don't see that as a major obstacle.

Eventually, such a machine could be built at a price affordable to consumers (look at what the original CD drives cost!), making the home-processing of Kodachrome a reality for "the masses"!