“At least as good as a 5 year old iPhone” should be a reasonable standard, I think.
The one in my Acura RDX is awful, and looks like it’s been transformed from one resolution to another before being shown to me using only part of the available screen real estate. It’s pathetic, and quite sad, given how competent the car is in general. I’ve driven and been in so many cars from Mazda, Lexus, Audi and others whose cameras look like you’d expect in 2023 -
A 108 megapixel phone sensor is not actually outputting anything close to a 108 megapixel stream (that would be 12000x9000 resolution, which is higher than 8K). It combines data from 9 different sensors to create 12 megapixel (4000 x 3000) images. One of it’s specialties is low light situations.
The real problem is that it’s not made to stand up to the use case of a car camera, and requires additional processing power to run which may not work with the zero-fault requirements of backup cameras (the reason the systems are almost always on separate inputs/wiring to the screen than the rest of the failure-prone infotainment).