Have to hope this part actually holds water and helps reduce game sizes: "If you look at a game like Marvel's Spider-Man," Cerny says, "there are some pieces of data duplicated 400 times on the hard drive." The SSD sweeps away the need for all that duping—so not only is its raw read speed dramatically faster than a hard drive, but it saves crucial space."
Because 1TB on my PS4 Pro already isn't cutting it with some games taking up 100gb+. But even if the SSD can significantly reduce game sizes it would be up to the developers to actually do it.
I dont get it if games would be smaller why use 100gb discs?