First off, the 560 Ti is not optimal for several games, and why should one have to settle for shitty graphics? If you have the money, get the best GPU you can afford! Also, once you start going to real resolutions and 4k becomes more the norm, GPUs like the 560 Ti will really start to show their weakness. I'm personally tempted to get a 2560x1440 monitor, but I also realize I need a better GPU first, otherwise my fps will literally tank. By at LEAST 30%, if not up to 70%, since that's about the difference in pixels between 1920x1080 and 2560x1440.
Being that I play Rift and actually a fairly good-sized chunk of mmo-champion users are not WoW-players anymore/DO in fact play other games in addition to WoW, WoW should not be the only benchmark we consider. Want to play games like Rift, Skyrim, BF3, The Witcher 2, Guild Wars 2, Metro 2033, Crysis (whatever version), Far Cry 3, etc, at a real resolution with at least decent graphics settings? You'll need far stronger hardware, including a stronger CPU, though the CPU offerings right now are not at all bad.