If they would can combine "Google Earth" settings a upgrade of Garmins mapping, get all of the CORRECT truck info in place, I'd buy one in a heartbeat!!
If Garmin used Google Earths codes (which are as current as possible because of their ability to use their satelite images and settings) alongside their mapping codes and correct tuck routing info and combined them for the constant ongoing ability to update at anytime, then add a cell phone system...hey, I'd pay a monthly service fee for a bundle like that!! But the system would have to be all over that and maybe a bit of a nicer voice giving me the turn by turn and the next street prompts and direction!!