I think it would be really great to have a camera with is only the size of the lens so it can be easily hidden within a wall or overhang with a cable running back to the hardware box contain all the batteries, computer components and wifi connectivity.
The reasoning behind this that camera can be a sign that you’ve got something to hide, especially when covering garages or parking spaces in off road shared areas away from the main property.
I don’t think this would be hard to design, simply taking the current camera apart, moving the lens away and adding a cable between where it was in the face and now is via a weatherproof cable.
For example having the lens here (on the outside of the garage)
Whilst having all the hardware tucked away here (inside the door)