Another gem of a feature has been discovered in iPhone OS 4 - dedicated support for in-car systems. This new feature allows an iPhone or iPod to generate an on-screen menu that is fed via a video out to your car using IAP (iPod Accessory Protocol). Your device then becomes a remote control.

Now with some states banning the use of cellphones while driving we are not too sure how good of an idea this is for anyone but passengers. Regardless, it suggests that Apple may soon introduce their own car kit. The ability to connect our iPhone or iPod (or iPad) to a car-kit to gain full access to the vehicles complete audio libraries sounds pretty cool to us.

Would any of you be interested in a Apple Car-Kit? Sound off in the comments!

Video after the break!