I've always felt the same about all those fractals and chaos books: Pretty pictures, feigenbaum constant, ... All fascinating, but I never saw any real appli

I've always felt the same about all those fractals and chaos books: Pretty pictures, feigenbaum constant, ... All fascinating, but I never saw any real application from it. Now this might be because chaos theory was in its infancy, or because the books for the public were too dumbed down. In that case, these applications might also apply here. Anybody an idea?