I'm not so sure the future is as bright as you make it out for all those groups. At the very least this change is going to bring with it a mountain of uncertainty.
As a driver, you probably lose your job. Not with the 3-5 year out model, but the one that comes 10 years after that. Even with the 3-5 year model, suddenly the competition for your job becomes extremely tight and starts to focus on things like people skills and entertaining, since the automated car will be doing most of the "heavy lifting" most of the time in a way that is automated into a commodity.
As Uber, you save a lot of money but you also lose a lot of moat, it becomes much easier/cheaper for other companies to suddenly field a fleet of cars.
As a car insurance company things look really iffy for you, again not so much in the 3-5 year timeframe but a bit further out when the human is completely unnecessary since at that point the insurance will be more about insuring the companies making the cars and car software and less about personal insurance, which means there is still significant money to be made, but probably far less than now (if the safety of automated cars turns out to be as great as it should) and by far fewer players.
As a car manufacturer, you'll do well at the beginning but the eventual model of a networked driverless transportation system should require far fewer people to own fewer cars and still live as if they do own cars, which is a long term problem for you when you've built a business optimized to sell cars to broad market consumers on a 5-ish year cycle.
As a government you should, in an ideal world, be in pretty good shape for the reasons you outlined, but good luck dealing with the lobbyists from industries this may "disrupt".
I do think driverless cars are quite a bit closer than most people think, for a lot of reasons, I just think they are going to upset a lot of applecarts on the way in, which isn't necessarily a bad thing unless you're an applecart vendor.