Hmmm... wireless video out is probably possible, but the touch screen inputs still need a physical connection - or at least I think it does. I'm not super savvy on how it all works.
I like my AppRadio2 very much, but I have a relatively high threshold for finicky electronics. In it's stock (not jailbroken) form, it is fairly stable. When Pandora is active (even in the background) on the phone, the AppRadio has a tendency to default to Pandora. It's annoying sometimes. I haven't done any real scientific tests, but it seems that some things cause Advanced App mode to not open properly. When you first plug the phone into the Radio, the phone will ask you to allow AppRadio to comuunicate with the phone. There will also be a "lawyer" sceen that you have to click OK on. With all the "allowing" and "OKing" that you have to press to get to the actual good stuff, sometimes it just doesn't connect and you may have to unplug and start over.
I bought the AR2 to save myself hundreds of dollars over something with built-in GPS. It works for me, but I'm not too sure if my wife would like messing with it. She's extremely intelligent but I don't think she cares for fiddling with electronics as much as I do.
I'd look hard at something with built-in GPS, and bluetooth streaming to make it as close to a factory radio as possible. I think you have to be pretty geeked out to enjoy using the AR2, but that's my opinion.
From what I've read you can plug your phone into the display at Best Buy to see how you like it. I would suggest to download the relevant apps and do some hands-on testing. It may or may not be as cumbersome as I make it out to be. I have a hard time gauging people's tech aptitude.