There are lots of amazing tools around that writers can use to make their books special. One that's not quite ready but could be very interesting is the Neurocam.
Readers will look a little silly using it: you have to strap an iPhone to your head so that sensors can measure your brainwaves and tell your level of interest of what you are looking at.
The device has a scale of 0 to 100. When you go above 60, the camera starts and creates a 5-second GIF of the image.
What if your book featured photos of three characters and the reader looked at each of them and automatically was guided to the version that tells the story from that character's viewpoint? It would be a modern version of one of those books that guided you to a different next chapter depending on how you answered a question at the end of the current one.
Or you could test several book covers and choose the one that evokes the most interest.
Even better (maybe) is that the decisions would be based on what you're really interested in, not what you say you're interested in. Would you prefer to read War and Peace or Fifty Shades of Grey? Ha, the truth comes out!
Some of the same thing kind of things could be done with films.
You can bet advertisers will be all over this (unfortunately, so will Big Brother).
If you want to see it in action, the YouTube video is at http://youtu.be/W67LvAYAkY4
(The best way to predict the future is to invent it. To do that, you need to be creative. My book, Creativity Now, can help you with that. It's published by Pearson and available from Amazon or your other favorite bookseller.)