Yes, but users don't normally 'scan' a scene, they point, focus and click. So if you want to have this work without the 'scanning' element you'll need two offset sensors.
This would be a lot like Google's how "artificial lens blur" feature works[1]. I don't think it would be too difficult to teach a user to move their phone a little to scan the scene.
I agree, but this is a usual trick. I remember an algorithm to make a "3D" image with a normal camera that expect the user to scan the scene in a similar way to create a deep map. (I can't find the exact link just now.)