An iPad in car dash system will be a godsend to people like myself as long as it can deliver Music, Navigation, Video, and Bluetooth Phone Connectivity in one easy to use interface. I've always wanted a Car PC but they all just seemed too yesterday and tedious to get running.
In comes the iPad, true the size will be awkward, but hopefully after a jailbreak or countless complaints to Apple, Landscape mode can be an option for everything. Once this happens it should be a lot easier to plant one of these on the dash. I currently own a Kenwood DDX8109 with all the extras, Bluetooth, GPS, Amps, etc., paid about $5000 for everything installed and I can honestly tell you it was totally not worth it. The interface is slow and extremely dangerous, touchscreen has a mind of its own, no multitouch, bad in cold weather, bluetooth works nicely only with lower level phones like flips, Garmin Nav is slow when typing, video looks awful, the list can go on and on.
I need something that will keep up with the times and what better than an iPad. Every developer and their momma will be touting out apps for this thing and you can bet on some of those being designed for cars. I wouldn't even be surprised if Kenwood made a nice app to go with a one-size-fits-all dash system. They've worked with Apple before and still do with many of their products. They really aren't selling in-car dash systems anymore like the OP says but they do have some understanding on car audio. Imagine a car setup that was based on an iPhone, iPad & iPod Touch. You could use your iPhone to control your setup if you ever forgot your iPad but if you wanted complete control or more choices, you bring in the big guns (iPad).
Regarding Multitasking, I feel everyone's pain but from news reports it seems it will be coming soon or you can always jailbreak and use what's already available, I think its called Multiflow. I currently use a Palm Pre and Multitasking is just a way of life for me. I would much rather have an iPad sized WebOS device in my dash but from the looks of the company, they need to focus on staying alive. If either of those don't happen or work, hopefully some type of app will allow cross interaction for music, nav, & video eliminating the need for multitasking while driving.
Touching on this device being underpowered or slow, I highly doubt it. The iPad isn't running a full fledged OS like Windows 7 or Snow Leopard, and it will be running on a fast 1GHz A4 made by Apple themselves. From speculation it will help with battery drain and I'm all for that.
So summing this up and adding some extra pointers, the iPad is a godsend to in-car dash systems because:
a) Large Consumer Base
b) Large Developer Base
c) 3G, Wifi, A-GPS, Compass!!
f) Apps Galore
g) Jailbreakable for non approved Apps
h) Keeps up with the times
i) iTunes in the Car!
k) Multitouch Soon...(or with a jailbreak)
l) Take it with you out the car
100,000+ more reasons (App Store)...
I think I'm going to rip all my stuff out and use a Kindle.
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a couple of problems i see-- see bolded areas:
i am really starting to think that the ipad will be a huge seller-- just think of all the free publicity it is getting, even just on these boards-- and you know what they say " any publicity is good publicity"...
i think we all need to watch for the "iTurd" next... I can see the slogan already: "smearing a Apple store near you!", with a chrome apple logo right in the middle...
My 2001 Mitsubishi Eclipse GT:
"The Project That Never Ends"
more projects then time!
Led Skyline Tail Lights--100%
High Power Led Reverse Lights--100%
Led third brake light--100%
Led front turn signals--0%
Most likely not. Apple devoutees are like cult followers. They put in the hard work free. Arguing about any disadvantages is a waste of time because there are none that can be conceived.
I think I said this about 10 years ago. Apple products are amazingly designed and perform their intended purpose very well. Period. Just like the feature list on any gadget. It's the users who have the disillusions, not Apple. Bring on the flames, LOL.
Apple does not allow this.