Actress Sarah Hyland, who plays one of the “kids” on ABC’s Modern Family, is 26 now. On the sitcom, her character of Haley Dunphy is fighting to be seen, and treated, as a grown-up. But as a guest on tonight’s Lip Sync Battle, she doesn’t have to fight. She just has to dance, and pretend to sing, to the Pussycat Dolls song “Don’t Cha.” I mention it not as a sign of feminist progress, but as a passionate enthusiast of TV evolution.