Yes it's about 5 times as long as typical movie, but that's only for one playthrough as well. Many games, especially ones like this that will probably have multiple outcomes, can be replayed many times and get a unique experience each time. Making it's value increase dramatically. #1.3

Yeah it does have head tracking, and you need a controller to give a good gaming experience. VR enhances the game experience, not replaces it. Although if used with the Kinect then that will fulfill your desire to not use a controller and game. Feel free to get a Kinect and the Oculus Rift and program some stuff for it and put it out there. #3.2

The other commenters are right. VR uses a headset to encase your entire view making you immersed in the game. #1.3