Here is a message from Sony Interactive Entertainment America marketing vice president Asad Qizilbash regarding the delay:
Developed by the Pixel Opus team at PlayStation, Concrete Genie follows a bullied teenager named Ash who escapes his troubles by painting spectacular living landscapes and mischievous creatures in the walls of his abandoned hometown of Denska. Using a magical paintbrush, Ash discovers his paintings can purify Denska’s polluted walls and bring life back to the town.
Pixel Opus, a development studio at PlayStation’s San Mateo campus, is targeting an early 2019 release date for Concrete Genie for the PS4 system. We’ll have more details to share in the weeks and months ahead!