Well, I respect Matt's opinion on GW but, the same speculation was going around the last election on the pretense that if he lost, he would not step down.
The truth of the matter is, that GW has pushed thru some laws such as the Patriot Act that absolutely gutted the Constitution and Bill of Rights. Many will defend him on these issues, but truth is, he TRIED to make them permanent not too long ago, and when he does leave they will still be in place for even more abuse than now. The government takes, but never really gives back what it takes, even when situations change.
He along with his predecessors have managed to spread our military so thin, that I believe much of our strength is more imaginary than real. Russia is proof of this. Europe, and the U.S. have made them, and China, and the Middle East rich beyond belief, and they are spending their wealth on bullets, tanks and rockets, while we go after cheap thugs in 3rd world countries such as Iraq, and he justifies it with lies, and then later mere propaganda, after the lies fall thru. And of course the American people as a whole buy the story.
I could be wrong, but I think it is still a little early for an American dictator, but we are close, unless Russia, and China, step in to re-arrange our social structure. They will be strong adversaries, as we have given them the necessary tools and have made the necessary mistakes. JMO