Correct! There are several apps that I've wanted to use over the years but the main blocker (for me) has been authorization. With this new feature from Tesla that all changes. I'm much more willing to purchase these apps now that I can limit their reach.
The real bonus is that it appears as if this update will help isolate the app from the vehicle. What I mean is that the current way these apps work is they poll the vehicle for data. This is bad because it (potentially) wakes up with vehicle and increases battery consumption. The way I understand it, this new method will allow apps to "poll" Tesla instead, which is a much better operation.