CarPC based on Raspberry are now reality, you could check an example here.
Carberry integration allows you to add steering wheel commands functionality and also other information like: Positive Ignition, Lights, Speedpulse... information.

Raspberry + Carberry could be a valid mediacenter alternative for your car entertaniment. Please check our project: Car Multimedia Center Carberry+Kodi

Connecting Carberry to car OBD port and using a GPS antenna connected to Raspberry Pi is possible to create a vehicle tracking system. Speed, Fuel Level, Engine Load, etc... could be read from OBD port and saved insiede carberry memory, combined with GPS position. Adding a 3G modem is possible to create a live tracking system.

Carberry has onboard an accelerometer + magnetometer sensor that allows you to record G axis movement related to car speed, in this way is possible to create a blackbox to track car behavior during a crash.

Connecting Carberry to car OBD port you can get real time data (speed, RPM, fuel level, turbo pressure...) and diagnostic errors. This allows to create a car diagnostic computer or a live data info panel like in our project. Please check our project: Carberry Info Panel

Carberry has 2 Canbus and 2 GMLAN lines: you can use one as input and one as output filtering or altering which information you want from the input to ouput. Using this technique you could alter speedpulse information in order to unlock video in motion on original infotainment systems while driving.

Using Carberry onboard accelerometer + magnetometer sensors is possible to recognizes car movement when is closed, comining these information with GPS position is possible make a full car alarm system.

In different cars is available speed info of each wheel, calculating different rotating speed is possible to understand if a one tyre is deflated than others and generate an alert for the driver. A similar product, created with dedicated hardware, was already developed by Paser. Please check product page: SAFETY KIT SKT170