Isn’t the bump already used to pack components that don’t fit in the rest of the device body? I don’t believe it’s only used for the camera.
Though I do hate that bump. I just tried a duo and the bump makes it awkward to hold as a tablet
A lot of their devices do that, but I doubt there is space in the iPad mini bump to fit anything.
The big examples are iPhone Air and iMac.
From my experience, the iPhone bumps are a lot more noticeable than their iPad siblings.