The difference between 30fps and 60fps never constitutes a "close" graphical difference. It's usually quite a large one. Part of the reason games like COD Ghosts and Titan Fall look relatively arse compared to other next gen games, and also largely why Forza 5 lacks dynamic lighting, night/day transitions etc (at least for launch). Some people are falsely under the impression that a 60fps game only has to look marginally worse than a 30fs game, this is wrong. The differences will likely be large, and this will be more evident at launch, and further in to the consoles lives.
True. The 60fps game will always age better.