Is There a Difference Between a Book and a Virtual World?

In our lifetime we'll see some pretty amazing things. So we move from the two d screen into virtual worlds. Who knows when that will be at a level where it will seem close enough to reality? Is that too simplicity of the way to think about it? Does it enhance it in small doses? I'm not sure. But the way i see, there's room for all these things. They do different aspects. Well, a movie is about two hours long a so it has to be a relatively simple story. People that try to do like long form book series, tmovies often hit upon the fact that they simplify it so much that a lot of the original power is lost