Are Film Defections Hurting Theater?

As more veterans of the theatrical stage defect to Hollywood, establishing lucrative film careers, many in the theater world are lamenting the trend. But are stage actors really damaged goods the minute they appear on film? “Is [Judi] Dench less convincing as the Countess of Rossillion in All’s Well That Ends Well than, say, Peggy Ashcroft was, because the latter had avoided playing James Bond’s boss? Do [Ian] McKellen’s decades of speaking the greatest verse ever written help or hinder him and us when he starts spouting piffle about pixies chasing rings?”