Good idea, but UPC codes contain only 12 digits which can be nested neatly under the machine readable portion. It requires significantly more print area to repr

Good idea, but UPC codes contain only 12 digits which can be nested neatly under the machine readable portion. It requires significantly more print area to represent a human readable QR code body. Maybe standard icons and a domain name (or phone number) could help identify the protocol and contents? The article also mentions that QR code readers are not widely installed. I think this will become less of an issue in "the future" when we will use our smart phones to interface with everything--refrigerators, drip irrigation systems, door locks, automobiles, etc. When that happens, consumers will demand phones with OEM scanning software and a dedicated scanning button.