Chris Roberts, producer of Need for Speed Most Wanted, stars in an interview with Microsoft about talking of the Kinect integration aspect of the game. It is a to be a feature of which enables the use of voice commands.
This can be done through microphones or sensor bar peripherals, and will free up the access to change car, pan the camera around, start the engine, add/change car components. So the trailer will exemplify all it has to offer.
Remember that Need for Speed Most Wanted will be arriving in the US on 30th October in the US, following three days after in the EU.