Microsoft released the Kinect PlayFit, a Xbox 360 dashboard app that tracks your how calories you burn using your Kinect across many games; including Dance Central 2, Your Shape: Fitness Evolved 2012, and Kinect Star Wars.
Rumors suggested the fitness-themed app would be announced at E3 last month, but the app was never officially confirmed. The same rumor suggested that PlayFit would eventually be paired with a universal heart monitor, codenamed "Joule".
In addition to counting calories burned playing with Kinect, the dashboard will show fitness leaderboards and post social "active challenges" to keep players motivated. Of course, Playfit comes with its own set of achievements, as well.
[Via Major Nelson]