Zac Atkinson keeps a desk in the corner of the living room of his one-bedroom apartment in Studio City, Calif. Not that he uses it much: The work-from-home television writer migrates from couch to kitchen table and back again as he churns out scenes for animated children’s programs. “The folks from the generation before me tend to have more of an office,” says Atkinson, 32. “Most people I know end up sitting on the sofa, and half the time the TV is on when they’re working.”