I just got 2019.12 and it is a huge update! I'm most excited about the web browser switch to Chromium as I'm developing https://tesla-screen.com and it was hobbled by the old browser.
Here are the updates:
* Chromium based web browser
* Adjustable TPMS!
* Autosteer stoplight warning
* On-route battery warm-up
* Multi-language support, including voice guidance
* TeslATari - more games and sleeker layout
* Software update screen
* Update to existing performance upgrade