It's very easy to lose track of the environment around you, to lose touch with the present.
When I grew up as a kid, we didn't know there were any other planets outside of our own solar system. It was widely speculated that planet formation was an incredibly rare event and that it's possible that other planets just don't exist in our galaxy, and it's just this special situation where we happen to have planets around our sun.
I believe that hunger for a 'lost dimension' of experience is a natural yearning in all of us, and it doesn't go away just because we ignore it. It is evidenced among other places in the millions of children and adults who obsessively read the 'Harry Potter' books. It is said that fiction is where someone gets to tell the truth.