The new solution enables media publishers to develop rich content apps for the iPhone and iPad that simultaneously control content, data and information presented on an HDTV while displaying synchronized content on the iPad or iPhone. The unique dual-screen solution leverages Apple’s AirPlay technology, which allows viewers to use applications that simultaneously present content, interactive options and data on both the touch device and an Apple TV.
This ability to broadcast separate content to a user’s device and Apple TV is not new (Real Racing 2 HD Demo), but the new APIs provide another easy way for developers to implement these features. Brightcove offers this demo of how it can be used:
(Thanks to MacRumors)