Persuasion has been studied for more than two millennia. Basically it can be viewed as the collection of methodologies aiming at changing, by means of communication, the mental state of the receiver, in view of a certain action (or set of actions) to be performed by the receiver. Inspired by this tradition, and by the practical realizations in the world of advertising, in this paper a novel generation of intelligent interfaces is introduced, based on the idea that systems will have goals of their own to pursue, as far as inducing users (or rather any audience) to believe something, do something or change their attitude. The world of leisure and of tourism can specifically be impacted by such interfaces. In the paper the main concepts are introduced, as well as elements that characterize persuasion systems in general; a revisitation of the concept of promotion campaign leads to the description of research prototypes and a short analysis of prospects for tourism.