Yeah the fact that it tracks the use of inhalers is very clever. It provides a much more rich history of use to help doctors decide the best way to manage their patients. Currently medications for asthmatics are determined by a asthma severity scale (symptom frequency, night time attacks, etc) - so a more fine-grained analytics would be interesting.

I would think this approach would work well if applied to other diseases where the frequency that the patient takes the medication is tied to symptoms - chest pain/nitroglycerin or acid-reflux/antacids are a couple of examples.