In theory, sure. But you're effectively saying computers have to process vision as well as humans, which some experts think is comparable to solving AI. I'm not saying Tesla won't make a lot of progress, but considering how many decades of research has gone into this very problem (I worked on it at Carnegie Mellon as a graduate student, and they've been doing it since the 80's) it will likely take longer than most people like to admit.

I actually don't know a single expert who thinks we're anywhere close to having a stage 4 autonomous vehicle. Most of the people I respect are pegging it at decades instead of years.

Hey, the human eye is a damn fine camera and has the equivalent of a room's worth of NVidia cards in processing power behind it. It does have very poor depth perception compared to radar or lidar, a quite limited field of view, and an inability to see through fog but lets not sell a person short.

With modern driver assistance packages, that's not true anymore. For example Mazda's safety technology apparently gives drivers access to radars and radar coverage that Tesla simply don't have; see e.g. http://www.mazda.com/en/innovation/technology/safety/active_... There's also been talk of mandating active safety systems on new cars because regulators are worried about the safety of drivers relying on just their own two eyes.