YES! I agree completely! And I’m building one now …
I just bought a new LCD monitor for the car … it’ll run on 12vdc, and I’m looking to test it out this weekend on our trip to Goblin Valley! We’ll be hiking Little Wild Horse Canyon, and then wandering around the goblins … this is going to be a wild trip! This will be the first testing of my “in car” computer (which I intend to permanently mount in the car), but also using wearable computers in the wildernes … full GPS tracking, and using the USGS DEMS maps …

Smart Cars Net Wireless Users. Forget trying to look for directions or shop on a handheld, auto-loving Americans will prefer dashboard delivery of information. Elisa Batista reports from the Mobile Commerce conference in San Jose, California. [Wired News]