I'm a long time computer geek but new to the CarPC arena. We're getting a Toyota Sienna. It would be nice if I could find a device that would allow simultaneous display of Navigation on the built in display (of the tablet/UMPC, not the vehicle) while sending a video file playback output to a display(s) in the back seat. The idea is that I would have a bunch of kid videos that we can control playback from the front while also using it for Navi.

I'm sure this can all be done with an elaborate CarPC setup, but I don't really have time for a whole project around that right now. Does anyone know if any android or other tablet or UMPC could do this with the right software? I'm thinking not, because most devices probably only have 1 video buffer.