As I contemplated the display of digital versions of posters and pictures, my mind wandered to other aspects of digitisation such as the creation of objects with 3d printers. The slippage between real and digital will become increasingly easy and prevalent. Consequently the world of the future will need ways to easily, quickly and reliably differentiate between what is original and what is copy – an ORI mark system. Detailed forensic investigation will always be an option to get an absolute answer, but people will need a more immediate mechanism to help them navigate an increasingly mixed reality world.