Today, he wrote a follow-up article at Desiring God on this subject. He provides a few helpful explanations about why he does not own a TV and does not watch many movies. A popular thought of the day says that Christians and pastors should see tons of movies in order to be relevant to the culture. Here's one paragraph of Piper's response to that:
"I think relevance in preaching hangs very little on watching movies, and I think that much exposure to sensuality, banality, and God-absent entertainment does more to deaden our capacities for joy in Jesus than it does to make us spiritually powerful in the lives of the living dead. Sources of spiritual power—which are what we desperately need—are not in the cinema. You will not want your biographer to write: Prick him and he bleeds movies."Though I practically differ somewhat from him with how much entertainment I take in, I still think his point is extremely valid. I should definitely be cautious about what and how much entertainment I take in. Because, if I'm honest, I believe my senses are often dulled by this exposure, making me less likely to enjoy Christ to the degree that I want to.
I would also say this same thing concerning Piper's thoughts on television:
"...It’s the unremitting triviality that makes television so deadly. What we desperately need is help to enlarge our capacities to be moved by the immeasurable glories of Christ. Television takes us almost constantly in the opposite direction, lowering, shrinking, and deadening our capacities for worshiping Christ.In the article, he also has some helpful advice on the danger of viewing nudity in films, so really you should just read the whole thing
One more smaller concern with TV (besides its addictive tendencies, trivialization of life, and deadening effects): It takes time. I have so many things I want to accomplish in this one short life. Don’t waste your life is not a catchphrase for me; it’s a cliff I walk beside every day with trembling.
TV consumes more and more time for those who get used to watching it. You start to feel like it belongs. You wonder how you could get along without it. I am jealous for my evenings. There are so many things in life I want to accomplish. I simply could not do what I do if I watched television. So we have never had a TV in 40 years of marriage (except in Germany, to help learn the language). I don’t regret it."