Aslan's Country was bigger and better than the old Narnia, those who had died were found alive in it, because it was the "real" one, whereas the old Narnia had been just a copy of Aslan's land. "That was the dream, this is reality." It is also indicated that Aslan's country connected "further up and further in" to the "real" England, where Lucy Pevensie was able to see her parents, who died in a train wreck that killed all the other Pevensie siblings (except Susan), as well as Digory, Polly, Eustace, and Jill.