I know there are microchips for pets, but I wonder if there will ever be an affordable lo-jack style technology added to the chips so that lost pets can be located within a certain radius (no idea what the range might be). I see lost (or stolen) pet flyers on NextDoor all the time and always wish the pets could be located right away via radio signal.
Actually there are a few other there that attach to the collar. One is called Whistle. And you can track your dog on your Smartphone.