As one viewer nonchalantly asks, "What else is on?" the final line of The Truman Show highlights a key message in the movie. The 1998 drama stars Jim Carrey as Truman Burbank, a man who's born and raised in the fictional harbor town of Seahaven, entirely oblivious to the fact that his life is being broadcast as a television show around the world 24/7. When strange things, like a light falling from the sky, or an irate former cast member hijacking the "set" force him to question the nature of his reality, he begins a desperate quest for answers and by the end of The Truman Show, freedom.

https://screenrant.com/truman-show-final-line-meaning-explained-what-else-on/