Does the book prove its central argument is true?

Yes, the book does prove its central argument is true. Steven Johnson's argument in the book is that video games, television, the internet, and movies help make people more intelligent. Johnson shows how over the years technology has grown more complex. For example, Johnson supports his claim, "When you spend leisure time interacting with social media and technology that forces you to 'fill in' and 'lean forward' you are developing skills that will ultimately translate into higher scores." (page 149)