The only benefits I can see are commercial - deliveries and freight saving on the cost of drivers.
I can see the fraudsters rubbing their hands already.
I assume that these cars will be fully laden with cameras at every angle in case of accidents for insurance claims and the like...
Big Brother evolution?

You rarely see a Bobby on the streets these days, perhaps traffic police will be phased out too.
Imagine the scenario, an accident occurs and driverless police car and ambulance turn up!