Earlier quoted context omitted.
Agreed. A 10% false positive rate is huge. Expand the dataset to millions and I doubt you can identify individuals quite so certainly.
I don't believe the application is in surveillance or tracking. It's just useful to know who is driving out of say a few people so you can adjust vehicle parameters to them. Modern cars will already learn about driving characteristics so they can better manage the car to match, but I don't know if they try to match individuals.
My truck has three "memory settings". I can adjust everything the way I want it -- different seat positions, mirrors, etc. -- and save those in "A". My girlfriend can then get everything the way she wants it (she's much shorter and smaller than me) and save her settings in "B". When I get in to drive after she has been driving, I just hit the "A" button to have everything adjusted back to exactly how I want it.
It's very handy when you have multiple people who drive a single vehicle.