I feel developed nations like USA, Japan, etc will soon start using autonomous transportation. They have been testing it, and they have a suitable infrastructure for it. Autonomous vehicle should be fun, and I am very excited about it.
The one field where we need decentralization is transportation. Large companies have a monopoly on services and facilities, and we are bound to use them. A decentralized transportation service will benefit the common people like us.
And I am positive that most developed country is ready for the DAV but lots of work is needed to be done before it hits global market. Most countries still struggle for normal vehicle and automatic vehicle is out of their reach. It may take time, but one day we will be there.
The US gets a lot of spotlight in the AV market due to the fervorous PR Elon Musk has. Tesla is making great advancements but so are German automotives, especially BMW.
And BMW already has a much more established infrastructure. I won't be surprised if Germany is first to kick in the mass adoption of AVs.