Couple days ago we made road test with our new Cardash LCD. It is 12.3″ sunlight-readable LCD (1000 nits) with resolution 1920x720px, connected to Raspberry Pi. LED driver board of this LCD takes power from standard car 12V input, and provides current to LCD backlight (this beast takes 16 Watts!), and also 5V/3A to power RaspberryPi or any other computer module you want to use. RasPi reads OBD2 data from OBD2-USB adapter (can be changed to Bluetooth OBD2 if you hate wires), and output it on LCD as a normal car cluster dash. We designed open-source software for this where you can easily configure how it looks like and how it works with OBD2; add any additional gauge and designed to look exactly like your car dash display or any to your liking. It is C++ project on GitHub that uses Qt5 cross-platform framework (yes, you can run it on Windows as well). All graphics are defined with QML markup language, custom OBD2 commands processing are defined in XML file.
We are working really hard to start selling these wonderful cardash LCD kits, price is not finalized yet, but it will be around $230+ for LCD with video converter board, LED driver board, and all cables. RasPi is not included, but I guess you have couple in your drawers 😉