Proving you can't judge a book -- or movie -- by its cover, "Fahrenheit 451" turns out to be considerably less than the sum of its parts. Featuring the tantalizing tandem of Michael B. Jordan and Michael Shannon, this HBO movie adaptation of Ray Bradbury's dystopian novel grinds along sluggishly, eclipsed by similar visions ("The Handmaid's Tale," anyone?) and becoming one of those films that, alas, looked better on paper.