At least the laws are mainly ready for driverless cars. Requiring a human as a failsafe is a reasonable short-term compromise - I am 100% for letting computers drive but there are bound to be a few bugs that will emerge in the first 5-10 years, just like algorithmic trading can lead to unwanted cascade effects. Enough people have a driving license that I don't think the 'human driver' requirement will be a major barrier to adoption. The main disadvantage will be on late nights, since people who are unfit to drive due to alcohol/drug consumption won't be able to use the driverless cars to get home.