That damn commercial. It kept airing in between game shows, its sentimentality breaking up the raucous flow of applause and flashing lights and cartoonish contestants. A little girl calling her grandmother on an iPhone and telling her about a sunflower she drew at school while the grandmother looked out the window at the lone sunflower in her yard and smiled. After about its 50th airing, Lottie powered on her father’s old desktop computer and ordered an iPhone on Amazon. She hadn’t made a...