Revival time for film noir?

Documentarian Matthew Sweet, whose "The Rules of Film Noir" is appearing this weekend on BBC Four, thinks so, and he gets Werner Herzog to concur:

“It’s not so much techniques of light or a particular kind of story. There’s something bigger behind it. You recognise a film noir very easily because it’s a cultural mood. . . All of a sudden the financial market unravels and there’s something real deep and sinister coming at us in terms of economics. These times are very fertile ground for film noir. But now, with a depression coming at us, we will see more film noirs than before.”