QR codes may not be around forever, but they have been a disruptive enough concept to inspire other interactive scanning mechanisms. They have also inspired others to get creative with them. Simplezesty has a great post that highlights a dozen or so ingenious QR codes, from tattoos to sand castles and graffitti– and most of them are scannable/readable.
Mashable, How to Make Your QR Codes More Beautiful
Squidoo, Creative Uses of QR Codes