Obtaining marketing information through facial expression could be the next big thing in advertising. It may help to avoid so-called zombies, i.e. logos, images or taglines on packaging that shoppers subliminally dislike or simply ignore. Resembling a bulky pair of specs, a device called an eye tracker can record the user's eye movement, revealing the spots where the person's gaze stays for longer or is rapidly averted in disgust or confusion. Next big step? Development of mainstream consumer gaze technologies for real-life users.