The co-chair of Disney Media Networks and president of the Disney/ABC Television Group considers mobile devices such as tablets and smartphones the biggest opportunity for video consumption growth. Why This Matters:As digital change recharacterizes the idea of television networks, Anne Sweeney urges the industry to embrace the shift, and to intensify its focus on innovation in storytelling, distribution, research, and failure. Speaking at a Royal Television Society conference in London Friday, the Disney executive warned that not taking these approaches could lead the industry to the same fate as the Betamax and cassette tape.