"They Say My Life is Like a Big Screen"

The distinction Postman makes in the closing paragraph is that people nowadays are laughing instead of thinking, and not realizing what they are laughing at or why they are no longer thinking. This distinction matters because with so much entertainment surrounding us, we are thinking less and less without even knowing it. Television provides people the ability to watch and be amused without having to think about what's even going on. There is no teaching or education in this, which is dumbing down the nation as a whole. And this lack of knowledge will eventually lead to disaster for our futures. His last paragraph basically sums up the whole message of his book, Amusing Ourselves to Death.