Time and space will break down a bit after 4017. Thoughts will be real. The three natures of God, the Omnipresent, Omnipotent and Omniscient, will be a natural thing for our Human family. We will understand the unseen energies that surround us and they will sustain us.
5400 is based upon our current time/space structure. The time of 5400 is an approximation. From 4017 towards this time, we will grow and understand our true place in the Universal Family as Thought Beings.
5400 will be the End of Things.
What that means is that the Earth Realm will cease to be and will be absorbed back into the Light of ONE.