What did Vanilla Sky say, especially what did the last sentence mean?

Vanilla Sky is a film released on 200 1, which is a remake of Alejandro Amen Nabal's Open Your Eyes, directed by Cameron Crowe and starring Tom Cruise, Penelope Cruz Sanchez and cameron diaz. The film tells the story of the brainless rich second generation David Ames. When he woke up in the morning, he found his friend Julie nearby, but David didn't like Julie very much. He met Sophia at a party. David and Sophia fell in love at first sight, but later he found more and more strange things. Julie crashed her car into a tree and David was disfigured. After that, David went to a dream company and wanted to have a good dream after death, but for subconscious reasons. ...

The last sentence means that David left the dream (he committed suicide by taking drugs before, but he bought "life extension" to continue his life in the dream before he died, and finally found out). See you in the afterlife and return to the real world when we are both cats, hoping to become lovers with Sophia.