As far as fiction is concerned, I think audiobooks may very well become bigger than e-books. (Maybe they already are.) I don't have any real arguments to back this up, it's just a hunch.
I was skeptical of audiobooks at first, but after reading about them in a
NYT article and listening to a few books over the past few weeks, I must say I've completely turned around. As long as the book is narrated well, I find myself much more able to focus on and enjoy the story itself.