> Why do self driving cars? Def no ad revenue there.
Sure there is. Many people commute in their cars for 1-2 hours per day, when it is illegal for them to look at ads on their smartphone. If Google makes this legal, it's another 10%ish increase in the waking hours that people may be clicking on their ads.
I think that Google's ambitions are a lot higher than this, of course. Self-driving cars will be a lucrative business for them in numerous ways. And increased ad revenue will be one of them.