Bottom line, they link you to content that you cant get without typing in some url into your phone. They are convenient when its relevant. Passing by a restaurant you might want to go to later, launch app with one hand, scan code, keep walking, review menu... They are links that transcend platforms, would you be just at apposed to a rfid tag that you just swipe your device over to connect? I think they are extremely useful when used correctly. They save time and they dissolve errors. They are essentially internet links removed from computers... when I hear the anti qr code arguments I think to my self, well are you against hyperlinks? Do you avoid clicking links that could give you additional information about something your interested in? Then whats your beef with a link on a movie poster or can of soup? They're here to stay until replaced by a nicer looking swifter alternative but the concept will never go away.