Bill Nye wasn't debating creationism. Now, I know that was the topic of the debate, but his goal wasn't to try and convince creationists that they were wrong. That's impossible: Ken Ham even said in the debate that his mind couldn't be changed.
Bill Nye's goal, and I believe he accomplished it, is the same it's been since the Bill Nye The Science Guy days. He wanted to convince children and young people to use scientific thinking and enter scientific fields. He wasn't speaking to the Young Earth Creationists: He was speaking to their children. He demolished the reasoning behind Ken Ham's belief, but notice how many appeals to the future of science he made? His whole tangent about how important it is to the future of the US economy? His thoughts were on the future of science, not the fact that some people have moronic beliefs.