http://blogs.wsj.com/digits/2016/01/04/how-long-will-viewers-stay-immersed-in-virtual-reality/
“Is that going to be the kind of thing that’s compelling enough as its own medium to hold your attention for two hours?” said Rob Bredow, Lucasfilm’s head of new media, at an Oculus conference in September. “If the answer is yes, we haven’t yet figured out all of the language of that sort of film-making.”