I'll believe it when I see it....or more to the point when I hop in one drunk on a Saturday night, slurring my words and then fall asleep on the back seat. Lets see what the driverless car will do then. Its impracticable as a taxi.
The Google Driverless Taxi service will be able to use Bluetooth or NFC to get your address from your Android phone, whilst you are watching your Google Glasses. Happy days.