If you haven't heard about the "Vook", here's a sales pitch:
My response: lame.
If you can't view it, try this link. Or this one.
At first, I thought maybe for non-fiction...the cookbooks or exercise manuals where you really want to see how to do a certain technique. Then I realized YouTube already offers the same for free. Okay...
But for fiction? Please.
A Vook ignores the best parts of print and video. Reading allows one's imagination to work, creating the look and feel of a world, characters, situations, etc. in collaboration with the author. The best movies bring together visual artists, writers, musicians, etc. to create a multimedia piece with a consistent experience. Do I really need a snippet of video to show me the "most important" part of the book? Hell no.
I do believe in new media and stretching the boundaries of storytelling. IMHO, this ain't it.