But publishers beware. Disasters make a nonsense of demand lead times and thus profit. Unacceptable margins, distorted or "tone-blind" pictures, originals lost to the ether...
It's not the fault of the technology. But if printers can't get the product right what chance is there for "book stores helping retailers to reduce their own stock costs"?
The only way to save pre-sale print costs and retail discounts is for publishers to set up their own demand printrooms with informed quality and stock controls.