The potential benefits of driverless cars are stunning. From the article: Autonomous vehicles traveling in high-speed “platoons” that reduce aerodynamic drag could reduce fuel consumption by 20%. Up to four times as many vehicles could travel on existing highways if all vehicles were automated. The Texas Transportation Institute says traffic congestion wastes 5.5 billion hours and 2.9 billion gallons of fuel each year. Self-driving cars incorporated into car-sharing services like Zipcar could affordably transform cars from a thing people own to a service they call up on demand. If perfected, driverless cars obviously increase safety, decrease cost, and improve efficiency for everyone. And as Tim O'Reilly pointed out, they are improving at an exponential pace. If you have other evidence to support your statement, you should have posted that.
90% of automobile accidents are due to human error, leading to 30,000 deaths and $300 billion in damages in the US alone. Fully autonomous vehicles could slash those losses by huge margins.