QR codes will not likely be used to their potential. They are being used as 1D bar codes. I have seen products with several QR codes all over different parts and in the manuals. Usually if you scan them going to a useless homepage or a manual that does not specifically refer to the thing being scanned without an exhaustive search.
Remember the most important fact about these codes: Nobody cares.
Remember the most important fact about these codes: Nobody cares.