While Take-Two has dropped hints that a port to the next-gen consoles as well as the PC could be on the way, Rockstar will make an announcement when they feel it is appropriate, according to Take-Two. So, if an announcement is coming, it will come from Rockstar.
While we do believe that GTA V is coming for the PC, if a next-generation version is also coming Rockstar is doing a good job of hiding that fact. Since GTA 5 has become the highest-selling game of all time, moving an incredible 32.5 million units, we do think that they would still like to make some additional money selling more copies of the game. We will just have to wait and see.