According to HighDef Digest:
"Due to continued lack of picture-in-picture support on Blu-ray hardware, the HD DVD will contain a trio of exclusive bonus features, including a "In-Movie Experience" video commentary featuring "the cast from Dumbledore's Army coming together to share memorable moments," the ability to "Pick Your Favorite Scenes" and assemble your favorite clips from the movie into a montage, and additional web-enabled content including downloads and other goodies to be announced."
I am somewhat pissed that Blu-ray is still behind with their specs. I am actually one who is interested in these interactive features and am getting frustrated day by day at Blu-ray especially with their lack of holiday profile 1.1 players.
