I'll guess that it depends very much on the use case.
For example I can see just scanning a QR code on a tesco card might be more convenient than remembering to type tesco.com/clubcard/join or texting a specific thing to a phone number.
The bus use case is quite good too since looking stuff up on timetables is always a bit of a pain.
OTOH when I see one on some random movie poster on the street, I'm really not likely to stand there in the cold, advertising the fact I have a smartphone to anyone around and possibly holding up foot traffic just to get redirected to some website that's probably going to load slowly over 3G anyway.
For example I can see just scanning a QR code on a tesco card might be more convenient than remembering to type tesco.com/clubcard/join or texting a specific thing to a phone number.
The bus use case is quite good too since looking stuff up on timetables is always a bit of a pain.
OTOH when I see one on some random movie poster on the street, I'm really not likely to stand there in the cold, advertising the fact I have a smartphone to anyone around and possibly holding up foot traffic just to get redirected to some website that's probably going to load slowly over 3G anyway.