You are still drawing a line where there isn't really one. The world of people is the world of everything else. People aren't separete entities, they are just small cells in a bigger entity. When there are no people? When will that be? Will that time ever come?
There are natural mechanics that are severe, arbitrary, and totally "inhuman" in our eyes, but they really aren't so alien. This external reality is only a convenient way for people to partition themselves away from that which they don't readily understand. Surely you realize that the deepest mystery of all is really our selves, why we are aware of ourselves in relation to other things, and why we treat them as something other than our selves. The only thing that really makes us different is that we think we are different. Because of this trick of the mind, we can transfer constructs of imagination into physical reality. There really is no division there unless we want there to be division. And we do want it, because we are conscious, and we need distinctions if we're going to learn new ways to shape and construct.
Besides, consciousness is not as special as we think. It appears to me that humans feel very high and mighty about having achieved consciousness very recently, but consciousness is not a kind of freak coincidence; the universe assembles nodes of consciousness "at will", and we just happen to be the first ones to know about it. Naturally, if the environment and materials are right, consciousness will appear elsewhere, in other spaces and times. So even if there are "no people", that doesn't mean the universe won't keep attempting to set up nodes of conscious entities who will continue to do the same kind of thing we're doing now; desperately trying to figure out how to shape the universe as we please. God created man in His image; why shouldn't we do the same?