The Internet of Things (IoT) will definitely revolutionize healthcare - we've already started with gadgets like the Apple Watch, collecting realtime data 24/7 (or at least while the user is wearing it).  Once we have enough of this sort of data, we can start building statistical models - neural networks, really - and develop predictive models that will enable those devices to say "hey, based on the microchanges and nuances we've detected in your blood pressure <or whatever>, you should go see a doctor - you are at higher risk for stroke in the next 30 days".