On one hand, I already finished RDR on PS3. It had amazing atmosphere and world, decent characters and story, fun but somewhat repetitive gameplay. The image quality and framerate were atrocious (I mean, it was playable, but..). I would love to see how it would look on my PC. But I don't think they will release this, it has been too long.
Now GTA5, I fully expect that to be out later this year or early next year on PC/PS4/Xbone. Take 2 would be insane not to do that.