Thanks for the links guys. I've seen several 3rd party head units by Alpine for instance, that are configured for Sync.
A few months back I saw an F150 commercial in the web, it was a guy pulling an Airstream and he was backing up using the OEM screen.
I'm a current sync/Nav user, it's clunky, but usable. The idea of a Apple play compatible system that would let me monitor a wifi camera as well would make things easy.
I also feel like I could by less (lighter) truck, and add the head unit to my liking for less then all the bundled packages....It's like buying cable channels!