I've been thinking about this lately.
From what I understand, John is building on Philo's ideas. He's saying that the Logos is not external to God; but is the very nature of God. Then he walks it out to connect it to the incarnation of Jesus.
It has interesting implications. So if the Logos is God's very nature, then He is driven to create, to give form, to order things logically. Everything that has a meaning is so because God wills it so. The logic and order of the universe exists so because God will not do anything outside off His nature.
IMO, this is the answer to the snarky question of, "Can God create a rock so big that He cannot lift it?" Well the problem is that it is not a logical thing to do, just like God does not make 2+2=5 because it is against His nature. Thus, "He wouldn't make the rock, because that's stupid."