If we're being honest, I've probably spent more time in VR Cinema 3D than any other Rift demo. The concept is simple: Someone modeled a movie theater, and you can play video files from your computer on the screen.
You can choose your seat, stare at the upholstery, get up and walk around the theater, or even turn around and look at the projector. VR Cinema 3D is basically like going to the movies without the twelve-dollar ticket, eight-dollar popcorn, and that annoying kid who kicks your seat the whole time.
In other words, it's pretty much perfect. And with the DK2's resolution, the experience should be even better. (Senior writer Brad Chacos wrote up his experience with VR Cinema 3D last year.)