I saw a video recently (can't find it now though) which said that you could make a service request to have to the cameras upgraded for free (the video was from the UK and recorded the user's screen, showing this option) but I don't have this option in my app (yet). Here's hoping. It was mooted as part of the HW4 upgrade and presumably the newer cameras would help with Tesla Vision, both in terms of range and parking (more data = better)? But even if the cameras are upgraded, whether the existing hardware can support higher res cameras is a question, and I've not come across any reports that suggest the rest of the hardware could be upgraded, or additional cameras could be added. Still, the quality of the current batch of cameras is pretty awful, and given the car relies solely on them now, a free upgrade would be most welcome at the appropriate time.