Downloadable files coming to next Harry Potter DVD

Users clamoring for alternate (read: easier) ways to transport commercial DVD footage to portable media players will likely enjoy knowing that the next Harry Potter DVD will reportedly feature "two downloadable digital files" for easy viewing on devices other than a vanilla DVD player. According to Jim Wuthrich, Warner senior VP of digital distribution, users can "buy the DVD and have the option of the digital copy," and apparently, he also suggested that "another studio was preparing to launch digital copies of a film tied to its DVD release." Unfortunately, details about the actual formats and whatnot weren't disclosed, so barring any unforeseen announcements, it looks like we'll be waiting for the December 11th release of Order of the Phoenix to find out exactly what this disc contains.

I wonder what it will be used for? IPOD or IPhone?