While I agree that efficiency won't make much difference by itself, you should see the bigger picture. Electrical vehicles allows people to use renewable source

While I agree that efficiency won't make much difference by itself, you should see the bigger picture. Electrical vehicles allows people to use renewable sources. Autonomous driving allows people to buy less cars. Long term they will also be more ecological to keep and maintain: They are simpler machines that break much less, and batteries are pretty much the only thing that will need replacement, which will eventually be 100% recycled using renewable energy.