In other words, Apple is going to ensure advertisers that there'll be no way for users to get around playing their ads. In addition, Apple can further determine whether a user pays attention to the advertisement. The determination can include performing, while the advertisement is presented, an operation that urges the user to respond; and detecting whether the user responds to the performed operation. If the response is inappropriate or nonexistent, the system will go into lock down mode in some form or other until the user complies. In the case of an iPod, the sound could be disconnected rendering it useless until compliance is met. For the iPhone, no calls will be able to be made or received.
In the case of a desktop or notebook, the UI and its components (e.g., menu bars, icons, etc.) may be faded, darkened, brightened, blurred, distorted or otherwise visually modified during the initial state (or while the advertisement is being presented) so as to emphasize that the desktop UI is temporarily inactive.