From the Developer's site
YOU are the ninja! The worldwide gaming phenomenon Fruit Ninja has now arrived for Kinect and Halfbrick could not be prouder to bring you the first ever Xbox Live Arcade Kinect title! Your arms are now blades, and the epic battle against the world’s most delicious produce is just beginning. Fruit Ninja Kinect is our evolution of the slice-em-up genre, where we worked tirelessly to utilise next-gen power for the juiciest combat ever!
With Classic, Zen and the frenetic Arcade Mode, Fruit Ninja Kinect includes all the action you know and love with precision control -- along with special features exclusive to Kinect. With Party Mode, four players can turn a normal night into a fierce tournament -- and the new Challenge system will reveal the true masters among your friends.