One other thing to look out for is the screen itself. Most tablets don't handle glare well and glare is particularly bad on an infotainment screen. I've also noticed that the PX6 is pretty much black out when viewed through sunglasses. I believe this has to do with polarity. You can get anti-glare screen films to fix these issues, but that also diminishes the resolution of the screen.
Anyway, it would be nice if the screen was actually built for a auto environment rather than a general tablet screen.