Should've phrased it way better, that's true. It's a very different kind of vision when you do environment mapping and distance measuring -vs- when you do object tracking from a static location. Yes you need vision processing, but at a much higher resolution (sky is huge, planes are small) and much lower complexity. (moving objects between frames are easier to track) My point is that it's not comparable to what the cars use as vision.
Doesn't ATC also need to actually deal with vision?