There's a real industry these days preaching to the converted. Here Todd Burpo's questionable but incredibly popular "nonfiction" book heads to the big screen. Greg Kinnear stars as a mild-mannered midwest preacher whose son "dies" on the operating table and returns to life, only to describe Heaven. Clouds and Jesus, you say? Who would have guessed? No one outside the Christian faith will care about this feel-good sermon, but it scores points for at least acknowledging that not all members of the congregation agree on the more abstract points of their religion.100 minutes PG.