I agree with you - it is nice to see the manufacturer design it in (and supposedly figure out how to extend the design in a way that makes computing pervasive within the cabin). However, I would prefer some sort of docking station for my Droid / iPod. My Droid will soon be a MiFi, and is already a super GPS. And speech-to-SMS box. And car radio. And law-enforcement-style video recorder. And eventually, a Hulu streamer.
My point is that with a dock for a general purpose device, I could do far more, and, not be locked into a monthly fee for a service my general purpose device (will soon) already provide.
I need a dock that provides a charging station without clumsy cables, line of sight to the GPS, a place where I can see the on-screen map, provide aux-in to the stereo, and an unobstructed view out the front windshield, and cooling. If you want to route an HDMI cable to the back passenger media station(s), that's a good idea too.
I mention cooling because in GPS mode my device tends to run hot. It is doing a lot, so this makes sense. I don't think it needs refrigeration, per se, but a fan might be nice. It is probably overheating due to the car mount, which wraps around the box and traps heat.