Oh ye who over symbolize and over syllogize, of course Christ has always ruled, he was with the Father at the time of creation after all, per John chapter 1. God exists in present, past, future all at once. Yet physically his feet have not yet touched “down upon the mount causing it to split north to south.” Christ is coming back to rule bodily for a thousand years. Did not the angel say to the disciples, “in like manner that you saw him go, he shall come again”?
the 1,000 years is symbolic of the time between His Ascension and return. His Kingdom is not of this world.