The goal of Samsung's Galaxy S Zoom variants is to combine a dedicated camera and phone so the one device can replace two of yours, and the Galaxy S5 Zoom might actually accomplish that.
Does that mean you might be able to carry around the S5 Zoom without needing a separate holster for it?
One can certainly hope, and that's exactly how it looks in this image.
A smartphone with an advanced camera is great, but it's only really useful if it's as portable as a regular smartphone. The reduction in size here is the logical measure for Samsung to take.
That said, this S5 Zoom photo leak is unsubstantiated at this time.
The source who leaked this image also reported that the Galaxy S5 Zoom will sport a whopping 20-megapixel camera with 10x optical zoom, up from the Galaxy S4 Zoom's 16 megapixels.