I agree, hopefully it becomes just like any other cheap and easy measurement like blood pressure. Most of the time, small changes and variations will be determined to be normal but having a record and a measurement allows you to determine what is abnormal or a symptom of a disease. It's the difference between having a measurement and having nothing at all (if you never got a scan with CT or MRI).

This seems like something MLB teams would install in their locker rooms if it works.