The x86 architecture can be built incredibility rugged if one is so inclined. I am using an SLC type SSD, Embedded operating system, DC>DC power supply , and passive cooling. The entire system is solid state with no moving parts. All wiring has been split loomed and connectors have been silicone bonded. All power runs are fused and relayed to the battery. Could this be used as a home PC? Probably but why bother? It's built for the car, it runs on 12 volts. If I want to compute at home I will use my LGA 1366 i7 workstation. In retrospect, I've owned my iPhone for approx the same amount of time since I finished this build and have had more problems with the apple product than I have with my custom built car computer. Sometimes to get things right you just have to build it yourself.
So for those who are throwing a HP tower in the trunk of their ride with a square wave sine inverter and wondering why things are not working out so well then yes, the iPad is right up your alley!