I worry about realistic augmented reality. It's OK to augment reality... but what if an added virtual monster hides a real, fastmoving car? Will you be the first ambulance on the scene then, or when a policeman fires on a child who pointed his aug-mouse(tm) at the policeman? "It looked like a gun," the shaken policeman says "and he was shouting 'die, demon pig scum'... how was I to know his game aug'd me to be a cacodemon?'" Augmented reality is one of the most exciting things I've ever read about, but I always wonder how it will go wrong, or be abused... will a hacker write software to "edit out" all blue cars from the game's perceived reality? Who's responsible? The hacker? What if it was a bug? The programmer? The driver? The court cases will be FASCINATING.