This is what I made on my car to remove all the gauges I had.
I bought 2din touchscreen monitor, all the parts to build a mini-itx based small computer to hide in the car, and a particular power supplier for mini-itx motherboard that's driven by ignition key.
Then I modified Windows XP to be the lightest possible, and now, any time I switch on the engine, this is what comes AUTOMATICALLY out in 24 seconds:
Very useful because I programmed warnings for all sensors' values, and even for "on run" mods to the map with the touchscreen feature...