Why o Why don't TomTom release a version of the Go! that fits into a standard DIN car stereo aperture and has a motorised screen?

Pods sitting in cradles on the dashboard or hanging off of air vents are UGLY and are too prone to theft.

Better still, why doesn't someone make a flipscreen DIN unit with PDA electronics capable of running the PocketPC 2003 O/S? That way we could run TomTom AND have simple to use MP3/MP4/DVD functionality all in one unit.