Games? Imagine Google giving away augmented reality glasses (let's call them Googgles) that help you find your way in the environment by allowing you to do a local search ('where are my car keys?'), by adding name tags to people you have seen before but do not know well, etc.

Now, that giving away comes at a price. Frequently, when a Dr. Pepper can enters your visual field, that can becomes an animated advert. Your glasses will know how to time those adverts so that they stay (just) below the nuisance point, because they will have read your gmail and that of your friends, and will know what you ate.