I see cars that fully drive for you being a bit further off... but ideally, if it were to happen, we'd all also have the ability to drive ourselves, with the "system" kicking in if it detects you going off course or about to be involved in an accident.
Comments
New tech that seems like it'll be coming sooner is cars that "talk" to each other. More on this, and what you talked about, here: http://iihs.org/research/qanda/crash_avoidance.html
(Expand section #8).