Map Of GTA 5 Vs Map Of San Andreas

Since the release of GTA 5 map seems smaller what we use to have in San Andreas but when you see them side by side you will really appreciate the size of the map of GTA 5 (Click on the image to enlarge). It is humongous, It really is. I am thinking will Rockstar make even bigger map for GTA 6 for the next gen consoles or just keep the same map and improve the detailing of the graphics — like what they did with GTA 4 after San Andreas.  What you think ?