According to VITEI Backroom, The Modern Zombie Taxi Co for PSVR is currently in backburner status. In other words, they are not actively working on the game at the moment.
The Modern Zombie Taxi Co is one of the earliest VR title to get announced for the Playstation VR. In this VR title, you play as taxi driver for the zombies, who has won the apocalypse and is now looking to go about their deaths like normal people. Check out this old announcement trailer from Playstation Experiene 2015.