Computer scientists at MIT have developed Vital-Radio, a technology that wirelesslessly measures heartbeat and breathing. Vital-Radio is like radar, transmitting signals from a router that reflect off your body (and everything else in the room) and depending on how long it takes those signals to return, determines what is moving and at what rate. This could potentially give hospitals and the health care industry the option of monitoring their patients without having to attach physical devices to their bodies, or without even requiring them to come to the hospital.

But Vital-Radio also has the potential to have an impact far beyond the scope of healthcare. Your heart rate and breathing are also indicators of your emotional state. As you become anxious, your heart rate increases and as you become calm, it lowers.

If Vital-Radio becomes built into wireless routers, apps can tell how watching particular movies make us feel and what music would best suit our mood.