I was using cruise control on the highway yesterday and thinking: this is like very cheap very crude self-driving. And you know what? In its limited UNIX-like way, it's great: the car does a much better job of gradually injecting fuel than I, with my brick-like human foot, can do. Robot 1, human 0.

And from there it's easy to think: couldn't the car also detect white lines and stay within them? It doesn't have to be perfect; it can be cruise control++. If it errs a little, I can save it. But otherwise, this is a function I'd love to use if it was available, for a sub $1000 price point.