The movie is a basic parable of the journey of awakening from delusion. At the end of his journey, Truman Burbank escapes through the final door into freedom from the artificial environment - Seahaven - in which he was raised. He steps through the door into a broader reality that is essentially the same world he’s always known, but on a larger scale; same paradigm, same dynamics, same everything really, just one level up. Just like Neo in The Matrix, Truman doesn’t escape from Maya, he just leaps from one turtle to the next.
“Your whole life has been moving toward this; you’ve undergone crisis after crisis, fought battle after battle, destroyed illusion after illusion. You’ve been living in a state of unrelenting emotional upheaval as your world collapsed around you, you’ve made a great journey, and now you’re about to discover the truth of your being. You’re about to leave the only reality you’ve ever known and step into a new, bigger reality you’ve never seen and only recently began to suspect.
In the movie-metaphor, Truman is just stepping out of a microcosm into the regular cosm we all know; it’s really the same paradigm he’s known in the vast soundstage of Seahaven, but on a different scale.
(Jed)