Hand tools and fabrication machines
We hate keys. They're the worst.
At FamiLAB, there were a large number of us members with implanted NFC chips in our hands. We decided a good use case for these things was to use it to securely start our motorcycles.
So here we are, ya know... in the future. With a relatively simple circuit, you can hotwire your motorcycle/car/Nintendo 64 to start right up using any sort of NFC tag you might have such as a subway pass, a Disney World card, or even your own embedded hand chip!