1. Mobile device comprising a visual input device for capturing external visual information comprising real visual background information, a processing device configured to associate a selected application with the external visual information, and to execute the selected application based on the external visual information and on user-related input information, and to generate a visual output signal related to at least one virtual visual object in response to said application wherein said processing device is further configured to provide said visual output signal to a projector device included within said mobile device such that said projector device will be configured to project said visual output signal related to said at least one virtual visual object onto said visual background, thereby modifying said external visual information.