On the streets of London, a CBS News reporter stepped into an Uber with no one at the wheel — a quiet but consequential moment in the long arc of humanity's relationship with machines and motion. Uber has brought autonomous, AI-guided vehicles into real-world service in one of the world's great cities, moving self-driving technology out of the realm of promise and into the daily fabric of urban life. What was once confined to test tracks and cautious pilots in American cities is now navigating London's layered traffic, its unpredictable weather, and its millions of daily journeys — guided not