Her is a great movie. Also, it predicts the optimistic version of the future, where people can rely on AI and robots for menial work and can instead have jobs they enjoy like "romantic letter writer" (main character) and "screenwriter" which is a job discussed by someone who lives in the main character's building. Money does not seem to be an issue anymore, people look to be entirely middle class. The viewer assumes that it's these kind of niche jobs that are left for actual humans to complete, as they involve deep abstract thinking too complex for AI. Of course, at the end of the film the "Her" OS has basically had an intimate relationship with the human main character, and is capable of deep abstract thoughts and ideas.