Bigger HDD
Considering the huge size of games releasing on the current generation, filling the original PS4’s 500GB hard drive really didn’t take that much doing. While revisions then upped the hard drive to 1TB, if you find yourself picking up a majority of the big releases coming to the system, you’ll be able to fill this up relatively quickly too.
With the patches that optimize titles to make use of the PS4 Pro adding even more file size to these installs, it would have been a nice inclusion for the Pro to further up the hard drive size. Storage solution costs continue to decrease, too, and with the PS4 still unable to use external storage solutions for install files, a 2TB hard drive would have made the Pro feel even more of a step up from the original.