Both The Ultimate Matrix Collection and The Complete Matrix Trilogy come with the In-Movie Experience (IME), an exclusive interactive feature that allows viewers to enjoy interviews and other material via picture in picture while the movie is running.
The IME feature is precisely why the Matrix trilogy is appearing on HD DVD first. Even after more than half a year following Blu-ray's introduction, many players are still unable to support picture in picture. For this reason, HD DVD movies such as Batman Begins, Poseidon and V for Vendetta have yet to appear on Blu-ray. The Blu-ray Association hopes to catch up by setting a deadline for all Blu-ray players to support such new features by this fall.