So what does earth look like while under a total theocracy, yes theocracy as that is what it would be. A world wide theocracy with a false god at the top of the pyramid. A dictator that proclaims itself to be God.
World wide conflict, with a god bent on retaining control at all cost. A war between technology and magic for control of the earth.
It would literally be Hell on earth.
Why did I just write this?