The key feature of this is the zero power storage on the business card.
In a drone or robo delivery case, there is already a massive power storage budget available, so I don’t see the particular advantage of this hack being relevant.
Keyless entry using an "unpowered keypadded card key" is an application. A key needing a PIN to work is useless to a thief. If someone finds out your PIN, you quickly disable it on your car too.
Regarding robotaxis:
"The side of the vehicle features a rugged touch screen. You receive a 4-digit PIN via text or app notification, walk up to the vehicle, and type that code into the car's screen to open the specific compartment holding your order."
You could roll up with your "unpowered keypad" to the taxi and key in a PIN via that. Saves the car from installing one, and there'd be an extra layer of security whereby your card could be coupled with the drop-off. It makes sense when you don't have or want a smartphone. (see below)
"External touchscreens mounted on autonomous delivery vehicles face several severe real-world challenges, making them one of the highest-maintenance hardware components on the vehicle... By shifting authentication back to the customer's phone, operators eliminate the weatherproofing and vandalism headaches of external screens while speeding up the drop-off process."
In a drone or robo delivery case, there is already a massive power storage budget available, so I don’t see the particular advantage of this hack being relevant.