Yes, we have all seen cookies marked with augmented reality markers. Games Alfresco has mentioned such cookies back in 2008. So how come such a paper got accepted into SIGGRAPH? Well, the simple answer is that you've haven't seen (or rather tasted) such cookies before.
Created by researchers at the University of Tokyo, Meta Cookie combines together a head up visual display and head up olfactory display to trick your senses. I'm not quite sure what was the goal of that research, but were successful in changing how the cookie tasted. Probably some smart marketer will find a way to sell it as a weight loss device. You just need a way to print a marker on broccoli to make it tastes (and look like) ice cream (with a crunchy texture).
Meta Cookie. Narumi, Kajinami, Tanikawa, Hirose. SIGGRAPH 2010.
image via BusinessWire