Re:My question is why? (Score 1)

Capacity. Would you want to deal with 40" barcodes? Sure barcode density can be increased, but you're still relying on the visible spectrum for data transfer. And consider that barcodes must be relatively flat and not damamged. RFID is a great technology. No, we are not effecient enough without it. If that's your train of thought, I'll be laughing at you while you ride your horse to work.