Even the 5mp HW3 cameras are capturing more data than we know what to do with it.
Pedantic correction: HW3 is 1.2MP, HW4 is 5MP.
(Regardless, I agree with the sentiment that pure camera resolution is far from the limiting factor. Basic decision making is still very problematic, let alone camera positions for cross traffic visibility. Certainly curious to see what HW5 brings but I'm not expecting purely higher resolution cameras)