The Kinect is an appeal to the more casual audience with its motion sensing capabilities.  That said, Xbox Live Studios president Jerry Johnson thinks that the core audience are still the most important advocates for the platform.

“I know there’s a lot of controversy over, are you turning your back on the core gamer Are you just focused on the Wii bunch? My answer to that is an emphatic no,” said Johnson. “The reason I say that is because I realize that Live was built on the back of the core gamer. It was built to benefit the core gamer, and it was built solely focused on the core gamer when it was originally launched.”

“We also know that is our best advocate to continue to grow our user base and grow the engagement with Live, he added.

Source: Eurogamer