Quote Originally Posted by Jaminos View Post
I can't say for sure because the answer was somewhat vague. But I am pretty sure at least PS3 to PD4 will not require to by the game again.
And I can say for sure that it will. It was officially stated that you can transfer you characters and progress and use the same sub (on the same SE service account) but you'll need to purchase and register PS4 version of the game to be able to do that.