Def Jam Rapstar doesn't support Kinect yet, but when it does, what will the sensor actually bring to the table?
Currently you can use the Xbox Live Vision Camera to record video footage of yourself, and when the Kinect support arrives you'll be able to use the sensor instead. According to Straight:
"The patch will allow Def Jam Rapstar to utilize the cameras in the Kinect, allowing you to record your performance. The patch will not support the Kinect's motion-control functionality or microphone."