In some use cases, it is useful to have the aspect ratio of the picture.
For example, if I need to find a photograph that would fit when printed onto a specific object (t-shirt, mug...) or fit in a specific frame, it would be very useful to see the aspect ratio of the picture.
Ideally, this would be a field that could be included in a search, so I can find all pictures with a 4:3 aspect ratio.