Also mixed messages but the latest seems to say that there will be SOME pro support for ffxv at launch http://www.pushsquare.com/news/2016/10/final_fantasy_xv_will_look_beautiful_on_ps4_pro
They never said there would not be any pro support at launch. They said that they could do more later on. So we can assume higher resolution, stable fps among other light things for pro, but they would need more time for more