It's now 2019 and in the UK, the QR code shows no sign of hitting it big, certainly not as an on-pack marketing tool anyway.
I examined hundreds of products in my local supermarket and found only 4 QR codes. 3 of those lead to dead mobile websites!
So it seems there'll be no return to the heady days of 2011, when QR codes were everywhere. I wrote up my findings in this article.