I am wondering why such silly articles are being made when All COD games have tried for parity. When the first COD game appeared on the PS3, It didn't come close to performing the same as the 360 version. When the next game came out, the COD teams got a handle on the PS3 and both games were on par. This is something the COD teams have always focused on so why is the difference today.
Its evident that developers have and will use the extra headroom with the PS4 when possible. If anything, the developers have to work harder to get the X1 on par then bring down the PS4.