If you want to see a truly excellently designed car display & navigation system, check out the new BMW 3-series (F30). They sprung for a non-standard display s

If you want to see a truly excellently designed car display & navigation system, check out the new BMW 3-series (F30). They sprung for a non-standard display size that is super-wide, which means you can show two things at once. I have it configured to always show navigation directions on the right 1/3, and switch the left 2/3 between map or music, or whatever. They also have a heads-up display which is awesome. It uses computer vision to detect road signs and show me the most up to date speed limit, shows me my speed right next to that, and the next turn coming up. When I switch through my iPhone playlist, it replaces the turn directions with the playlist, same when someone calls in. It's completely non-distracting and right in my field of vision while I'm driving, looks like it's just "floating" in front of the car. Then they have the iDrive rocker, which moves left/right/up/down plus spins to select more complicated things, like moving through a playlist or typing directions into the GPS. It means that I keep a very natural driving position even if I'm controlling something in the car, with one hand on the wheel and my right hand by my side.