It's a bit too easy to get caught up in shooting down ideas, I think.
Here's a shot at spinning it positively:
- if you have kids in the back, no need to worry they're going to open their own door while you're doing 75 on the highway (sure, there are child safety locks... are you sure the little switch is where you think it is? If you ever carry adults in the back, or once your kids notice there's an interesting little switch there, it probably isn't)
- tight parking spaces; you (or your child) will never ding another car again while opening a door! I'm also frequently in super-narrow parking garage spaces, where it can take some creative gymnastics to squeeze through the door, particularly because I have to get a baby from a rear-facing carseat in the back of a 2-door hatchback That highlight in the video looked pretty appealing to me -- this is a frequent annoyance. I also have a nice little dent on my own door (the only dent on the car...) where someone banged my door with theirs in a parking lot, and left without leaving a note. These are pretty common use cases.
- Raining? Zing open the big door (and pop open a big umbrella or two) and let everyone get out at the same time, quickly and easily, helping each other without dodging around four large wet pieces of metal jutting out of the side of the car -- you can even hop out of the back seat to help your grandma out of the front without a big, wet, dirty door in between you.
I'm not sure I want these doors -- to be sure, there'd be a price premium, and there may be other downsides I haven't seen yet -- but I'd consider it, with or without a map pocket (er, they could have one with a closing lid, I suppose).