The slick thriller starring Michael Fassbender and Cate Blanchett manages to make monogamy look hot. That’s how good this Steven Soderbergh film is. Photo: Universal Black Bag begins with Michael Fassbender’s back to the camera in an unblinking tracking shot from city street to subterranean club, and it is immediately clear that I am in the hands of a master. In this case, Steven Soderbergh, in his second film of the year, after the ghost story Presence . Soderbergh’s camera graces Fassbender’s