Book trailers

I'm a little late, but I don't think we've seen the peak of the book trailer yet. It's an inexpensive way to market books online (and in some cases, too inexpensive). It doesn't have to be fancy. You don't need to shoot it. But you should know what your readers want to see. The Gorillaz do. You could say that some book covers lend themselves to trailers easily. Some genres, too. Bertelsmann gives awards for its book trailers, so maybe they're on to something. Do you think it will catch on here?