This seems like a good use for AR -- Epic was showing off an app a few weeks ago where Unreal Engine devs could use the front-facing cameras on iDevices to capt

This seems like a good use for AR -- Epic was showing off an app a few weeks ago where Unreal Engine devs could use the front-facing cameras on iDevices to capture skeletal animations, and I could see a fitness app using this tech to detect bone positions and provide guidance.