We're still years away from a Tesla that can deliver you safely to work whilst you doze serenely in the drivers' seat, but both the Model S and Model X took a big step in that direction today with the release of the eagerly anticipated Version 7.0 software update, and its best new trick: Autosteer.

The update will roll out gradually over the next five days, automatically applying itself to all Model X SUVs and all Model S sedans produced since October of last year. These sorts of updates, while largely a curiosity among the auto industry as a whole, have become commonplace for Tesla owners. Still, this is the biggest update by far, taking the first big step toward the eagerly anticipated Autopilot mode.

The main new feature is called Autosteer, which is basically an advanced lane departure assist system. The car will automatically stay in lane, slowing down as necessary to avoid traffic and steering around curves. The vehicle will even change lanes, though only when prompted by the driver hitting the turn signal -- and only when the car detects the way is clear.