Spacial audio is just needed for the coming Apple VR glasses. If Apple cared about putting regular dolby surround in their headphones whey would have. But with the spacial audio they can call it some new fancy name and license it out to studios who want to use the glasses as a new way to view movies without a home theater. If I had to take a guess, your old movies will not be given the surround sound treatment, but movies you purchase through itunes and new releases will most likely allow you to listen to them using this new kind of surround sound. THEN after Apple starts making all the money will Netflix jump on the bandwagon and make some of their movies work with the Apple VR thing.