This is TERRIFYING to me. We all know, through countless examples, that software and hardware and the people designing them are fallible. You're one bug, random cosmic phenomenon, or hack away from being stranded in the middle of the road at best or splattered on the side of a building at worst. (And in the fun in betweens like mowing down a group of pedestrians, t-boning another car, driving off the side of a twisty mountain road, etc.)
I can only hope that the self-driving bits are isolated from the entire world, but we know they're going to be connected to an always-on 5G network to receive updates and/or check a licensing server or something. That makes them vulnerable.
Terror aside, the user interface confuses me a bit. I assume you give it a destination. What happens when you get to the destination? Right now we get vague "your destination is on the right... somewhere..." messages, especially in "less developed" areas. There has to be a way to guide the car to the right place. Or what if you have, I dunno... to throw up or have raging explosive diarrhea or you spot a dying child on the side of the road or you spontaneously burst into flames or any other instance where you'd need to pull over? What if you want to back into your driveway because you're too lazy to walk around the car to haul groceries in? What if it's cold and you have a long rural driveway and you want to drive to the end to check your mail and then drive back to your house?! Or maybe you want to slow down to enjoy the view.
If it's relying on voice commands to accomplish any of this, well, I'm skeptical that it will work out. We've been hearing for YEARS that Siri has 'gotten better', and yet it's still miles away from being able to reliably accomplish controlling a car. Unless car Siri has been rewritten specifically for that purpose and they hired a whole new team to do it.
Maybe you have to write shortcuts for things like "pants caught on fire" that will pull over.
Not to mention the regulatory hurdles... This seems like an optimistic AirPower situation to me.