I would presume it is targetted at new clients + old clients that have funds.In a time where people dont have much money. Telling people to buy a new console to replace one that isn't old is not what I would do. Specially not when you earn money on games and not hardware.
Majority of old PS4 clients are expected to stay at PS4 1.0
I wonder if they will adopt Vulkan heavily if they will go for newer GCN in new PS4. Vulkan while generally low level is definately higher level than current PS4 API.