Isn’t the biggest fear of a chip-implanted human to run out of use-cases for their chip, regardless of its real utility? Let me extend your chip-honeymoon phase by showing one of the least expected features. I promise can be useful, it just depends on how good your imagination is 
Presenting the LF Cat Door Opener
Let me throw the first rock: you can let in the neighbor’s cat (if they get along with yours). Your cat cannot easily let in friends because he will be filling the scannable space when he gets in. The scanner also tends to have a time limit until it automatically closes, so the cat friend will probably be locked out by the time they arrive at the door.