The idea that bog standard 'birds eye view' would require HW4 is the saddest thing I've heard today. How powerful is the computer that Nissan puts in a rogue to provide that view, as compared with HW4?
The processing power probably isn't the limitation. It's probably hardware, like the number of hardware ports for the cameras are limited. These aren't webcams stuck into a USB hub. If they're physically out of pins, then hardware development will be required, either for some hacky, relatively dangerous (you would be switching out primary cameras), multiplex solution, or the addition of a computer and the support/supply chain nightmare that entails.
I'm guessing they mean more it's a limitation of where the cameras are placed rather than the processing power. HW4 slightly tweaks the camera positions and angles which I believe removes the current blindspots that make birds-eye impossible.
