HD-DVD's interactive layer is an MS API, I heard. Disney cited the BR interactive layer as one of the reasons it chose BR. If they do adopt the HD-DVD interactive layer, it could just be a compromise, just so they could say the unified format has elements of both formats. Toshiba proposed their disc format and BR multilayering technology. Sony and Panasonic rejected giving up their physical disc format. Toshiba realizes their multilayering is inferior. So the interactive layer may be the only way they get their thumbprint on the proposed unified format.
The studios want things like transparent menus over video playback. They also want to be able to have you download subtitle or additional language tracks, commentary tracks and extra content over an Internet connection. Actually one of the format would even have local storage for downloaded content while the other was focusing on streaming.
For consumers, you have to wonder how long the studios would maintain these servers. If they release a disc of a movie which wasn't the biggest hit, would they bother continuing to maintain infrastructure to provide content for it? Plus a lot of people don't want to have to connect a disc player to the Internet (not to mention bear higher prices for connectivity and storage components).
The studios want things like transparent menus over video playback. They also want to be able to have you download subtitle or additional language tracks, commentary tracks and extra content over an Internet connection. Actually one of the format would even have local storage for downloaded content while the other was focusing on streaming.
For consumers, you have to wonder how long the studios would maintain these servers. If they release a disc of a movie which wasn't the biggest hit, would they bother continuing to maintain infrastructure to provide content for it? Plus a lot of people don't want to have to connect a disc player to the Internet (not to mention bear higher prices for connectivity and storage components).