Traditionally, studios have released a video game to accompany a movie release. Now we'll have movies that also double as their own video game! Crazy.
I know I'm coming across as not being able to think about this outside of the context of game, but I do get it. This is an insanely monumental shift in the way we experience stories. It's neither a movie nor a game. But it's cool to think that you're watching this "movie," and then maybe you could stop the story and take control of characters, or go back to scenes after the credits roll and see how those scenes are now levels. Even that is probably small thinking, not even touching where this technology will take us. Hard to imagine.
I'd like to see a thriller story, similar to Heavy Rain or Momento or Se7en. Some kind of murder mystery where you can jump between scene locations or explore a small city. Your understanding of the story would depend on which scenes you witnessed, and repeat viewings but in different locations may give you further clues or different perspectives. Where you organically progress to the end of the story, following your own path, and the "ending" of the story depends entirely on what location you ended up in. You could compare notes with your friends, suggest which locations to be at during such and such time of the events, and each person might have a totally different experience.
Imagine watching Se7en, but you're with Kevin Spacey instead of the detectives at the beginning of the movie. A totally different experience.