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Without doing much of anything Apple has made an impact in car entertainment. For example, BMW offers a plug, located in the glove compartment, that will hook up an iPhone 3G, iPhone 3GS, iPhone 4, or iPod Touch (second or third generation) directly into the vehicle's audio system.
For years, many an iPhone or iPod user has had all kinds of wires dangling from their dashboards.
Apple's iOS4 allows these gadgets to output and display an iPod interface on a connected device's external screen.
Microsoft is teaming with Ford for MyTouch which heavily relies on voice activation.