Eisner, Ovitz, Semel, Diller, Katzenberg, Geffen, Guber…riding off into the sunset, their eras drawing to a close. “In the same way that audiences have lost their taste for film, filmmakers have lost their passion,” says David Thomson, author of “The Whole Equation: A History of Hollywood.” “It is not surprising that some of the moguls are giving up as well. They are as depressed and tired of the business as the rest of us.” This from a sharp and concise sum-up piece by David Carr in the New York Times…worth reading.