You need to do some homework. In addition to optical sensors that are better than our eyes (full resolution over the entire scene, no need to shift focus, no competition for processing resources, etc.) autonomous cars also use RADAR and LIDAR, giving them the ability to track objects in the scene with centimeter accuracy.
The algorithms that process the torrent of data, and the hardware on which they run, are improving at a very rapid pace. Humans are not improving at all. It's possible that, absent any evolutionary selection pressure for superior hand/eye coordination, rapid reaction time and situational awareness (all advantageous in a predatory environment) we'll actually evolve to be less capable drivers over time.
I don't know how long it will take to happen, but humans driving cars will be but a blip in human history, far shorter than humans riding horses.