Why do people think that the big games won't take advantage of extra performance if say the PS4 or Xb3 are say twice as powerful as the other? If you're creating COD MW4 or GTA 6 or Elder Scrolls 6 which are massive franchises with expected sales in the region of over $500M you've got at least $100M to burn so why not make the game look like you spent the money on it? I would predict that for the games which actually matter that any performance difference would be obvious to the end user.
Tease.