Coolest thing about that entire keynote was the connectivity to the car. Tell me how Apple has negotiated with the largest car manufacturing companies, GM, Toyota, Honda etc. to have a button placed in the car that will fully integrate with the iphone voice command, phone book, siri and music!!
Imagine the next step which I am sure they already have in development, bluetooth transmission of your screen to the cars display ... map directions, internet, text, movies ... everything. They effectively just killed the Nav companies. You have turn by turn in the car which you can then take out with you when you park (NY, SF etc.) seamless. You have self-updating maps, no need to buy new DVD's etc. and what every nav is missing COMPLETE business listings etc.
FREAKING RAD
I don't think there will be a Siri button. I think they will just allow you to map the call button in all cars with bt to access Siri when connected to an iPhone. It makes no sense to have a button for Siri when not everyone has an iPhone. Plus most of those companies use qnx.
Android included nav and didn't kill the nav market. Neither will this.
Many of the new car nav have access to all listings, but the monthly fees are crazy. I think it was like $20 a month on the new GS350.