For those unaware Intel operates on a "Tick Tock" approach. Where by they introduce a new architecture (Nehalem, Sandy Bridge, Haswell) and then the following year they take that same architecture, tweak it slightly, reduce its physical size then ship that as a lower-power drawing less expensive to manufacture part (Penryn, Westmere, Ivy Bridge, Broadwell).
So what this means is socket 1155 the current socket will only see Sandy Bridge and Ivy Bridge. It will not see an upgrade to the 2013 Haswell architecture which will increase performance (which is what Ivy Bridge did not do as it was only a Die Shrink)
Here is the leaked slide:
