There was an interesting post yesterday on Senior Housing News assessing the value of a Fitbit  device for seniors.  According to the author, George Yedinak:

"This simple, health monitoring device could have immediate application within the senior market. However, it does not function as a personal emergency response system (PERS) and is not particularly senior-friendly with the size, the small screen on the interface and the iPhone app/web application to manage the device."

We agree George.