Other Kinect games need to emulate what Dance Central is doing right.
The game itself is an outstanding bridge to dancing, even if you don't like to dance! DC lets you jump right in to play any song of your choosing, or lets you practice dance moves in a tutorial mode in order to familiarize you with the routine. Once you do a song on Easy mode, it sequentially moves up to Medium, then Hard. This may seem irritating at first, but the difficulty of some songs after the first set will make this an understandable and well-thought out system.
The game allows you to dance battle locally, which means you dance one by one with another person during the same song, trying to get a better score. This multi-player facet makes for a very social game. With new music coming out all the time, you can expect new downloads to be cropping up for DC every so often, giving the game more longevity.
I would highly recommend this game, such as it seems to be the only decent Kinect game on the shelves at the time of writing.