There really is too much friction in your average use-case for a QR code for it to work, in my opinion. See code, decide to look at it, fire up app on phone, t

There really is too much friction in your average use-case for a QR code for it to work, in my opinion. See code, decide to look at it, fire up app on phone, take picture, wait, oh a boring website link guess I won't use this again in the future. For things like the Korean subway shopping experiment (http://www.youtube.com/watch?v=nJVoYsBym88 http://www.youtube.com/watch?v=nJVoYsBym88) it works because you can shape people's interaction much better.