It's been invigorating being back on the West Coast, being at Alphabet, because there is so much innovation. And the big challenge is, how do you think about resource allocation and priorities when you have so many great options? But wearing jeans instead of suits and popping into driverless cars has also been a lot of fun.

From a societal aspect, when you are impatient behind a driverless car and there's no one to listen to your beeping horn, what are people going to do? How are they going to take out their aggression?

I think that technology is the best thing that ever happened to mankind. It's an absurd notion that somehow, 'My God, what are we going to do when driverless cars come along?' It's going to save lives on the road. And maybe, one day, we'll all be working four days a week and not five or six days a week.

Restrictions on mobility will be removed as cars become driverless. We'll be chauffeured, basically.

Imagine a world where everything that can be connected will be connected - where driverless cars talk to smart transportation networks and where wireless sensors can monitor your health and transmit data to your doctor. That's a snapshot of what the 5G world will look like.