This is exciting technology. Something I want but that does not exist is being able to test your blood with your own personal device without sending any of the data or blood over to private corporations. The corporations only sell the software.
You'd be able to download different programs that analyze your current health state from blood, or any other marker. The device would be able to tell if you are at risk for any disease just from a common set of samples.
I know this is kind of unrealistic, because to make better programs you need data from people. But who knows. Maybe one day we'll get there.