From the article:
The company said its Autopilot feature can keep speed, change lanes and self-park but requires drivers to keep their eyes on the road and hands on the wheel, in order to be able to take control and avoid accidents.People in the cars have to be aware of this. Cars are not "driver-less, but there to help out, right now. If the person was aware of this, then it comes down to driver-error.
Cruise control controls the speed of a car, but it's up to the driver to slow down if something comes in front of the car. This does not appear to be a driver-less car just yet.