One of the coolest technologies that Tesla has built into their cars is their ability to support over the air software updates. Typically they release these small over the air improvements every month or so. They take about an hour to download once your car is parked and plugged in.
Here are the most recent updates as of this morning (January 12, 2016).
1. Perpendicular Parking
2. Enhanced Autopilot Visualization
3. Autosteer: New Safety Restriction
4. Garage Door Auto-Open/Close
5. Vehicle Lock Improvements