Being able to take it with you would be nice. I really like the factory look that many people have achieved in their cars with a permanent mount though. My uses for it would be mainly music and navigation. But being able to use the internet to look up information, store maps, and run apps and play movies would be awesome added functionality for trips and stuff. The only problem I see with it is data connectivity. I guess you either have to pay for its own data plan or run a hotspot off your phone for it or something.