Well it seems clear to me that the "core human task of driving" is the supplying of inputs to the 3 major controls: brake, accelerator and steering wheel (5 if

Well it seems clear to me that the "core human task of driving" is the supplying of inputs to the 3 major controls: brake, accelerator and steering wheel (5 if we include clutch and gear selector). I'm not necessarily agreeing with kirse, just saying that the line is well defined. Adaptive cruise control (and even regular cruise control) definitely crosses the line and is available today in a bunch of mass market vehicles.