"Convenience". They assume that in the morning you are going to go to work if you are at home, and in the evening are going to go home if you are not, so automagically start routing you. It will (or should?) do the same thing if you have an entry on your calendar with a location, and you get in your car to go there.
This is supposedly a pre-pre-precursor to FSD whereby you wake up, get in your car, buckle up, take a nap, and awaken at work; though seeing will definitely be believing.