> Imagine if Car A could improve its own understanding of the environment using inputs/sensor data from nearby Car B.
You can't rely on this in real time because urban canyons make it hard to get consistent cell signal (for one thing), but you can definitely improve your models on this data once the data's been uploaded to your offline systems, and some SDC companies do this.
A system of this sort could use some local area networking (think infrared, RF, or even lasers) to create an adhoc mesh network. It's how I imagine cars in the future to be networked at least.
You can't rely on this in real time because urban canyons make it hard to get consistent cell signal (for one thing), but you can definitely improve your models on this data once the data's been uploaded to your offline systems, and some SDC companies do this.