One of the best things about the iPhone is how it can become much more than a phone depending on what apps are loaded on it and what devices its paired with. Take this Blue Flow breathing monitor, for example.
For asthmatics, it's important to keep track of breathing patterns to look out for deterioration. With this concept device, you'd simply breath into the sensor, and it would wirelessly transmits the data to your iPhone, which passes it along to your doctor. Not office visit necessary. Ain't technology grand?