Warner Bros. has taken the unusual step of launching "App Editions" of some its movies. The only titles on the App Store so far are Inception and The Dark Knight, but each is a universal app for the iPad, iPhone and iPod touch, and presents the option of either downloading the movie or streaming it over Wi-Fi or 3G. Included with each app is a collection of DVD-like extras, such as videos, games, music and wallpaper.
