“The controversy raises a number of questions that are hard to answer: Is sustained focus even possible in mass audiences anymore? If not, what have we lost? But part of the discussion, taken on its own terms, boils down to a fairly tractable psychological question: Who, really, is more engaged? Is it the audience member holding a screen and responding to the action with his thumbs, or the one sitting silently in the dark with her eyes glued to the stage?”