Sure this is a neat toy, but where are they going to get data on _everyone's_ heart signatures to make this practical. That's not going to be eas... Looks at A

Sure this is a neat toy, but where are they going to get data on _everyone's_ heart signatures to make this practical. That's not going to be eas... Looks at Apple watch.. looks at fitbit.. looks at Samsung phone with heartbeat monitor.. huh