Pairing 2 trends: Childhood Obesity Meets Mobile Devices (And Games)

As I sometimes do I like to look at seemingly seeming un-related trends and look for a common thread. The past few weeks (while working with Unity3D) I began to think a bit about the trend toward childhood obesity and the IPhone & ITouch - which led me to an interesting direction. It would appear very practical (being that the IPhone and ITouch a sensitive to motion) a simulation/game could be created that would translate device movement (provided it was in the users pocket) into a live fitness snapshot or profile - or provide the child with in-world currency based on activity (movement from the device). Perhaps we will see an organization develop something - if so I would be happy to provide more insight (I have many more thoughts on this and some prototype enviroments)