Both of these are easy to setup with windows. Check out my sig link, I go through the way I did it on my truck... had everything hooked up to a T or X series laptop... same thing though, permament screen mounted, laptop in the glovebox.
Now as for running it on a slate... if it's got and OS and a USB, then there are always options. I am honestly amazed at what some people do with these things.
The touch screen element is probably a large feature that I should be paying more attention to. The "gesture" ability of multi-touch is hands down the best way to go. Very clean, very precise. Don't have to worry so much about touching a certain area or replacing your hands with tiny baby fingers. Something to look into. I wish Apple would do me a solid and go ahead and release the specs on the iPad 2.0.