I think Sandy Bridge E may be the only big enthusiast desktop socket during the Sandy/Ivy generation, much like Lynnfield was pretty much the only choice for the consumer during Nehalem. And both were preceded several months by the original sockets for each: Bloomfield (LGA 1366, i7-9xx) for Nehalem representing the high-end, and now, standard Sandy Bridge representing the mainstream. Furthermore, and this is where I begin reaching, the 32 nm die shrink only applied to the mainstream for the mobile and value segments, and the Extreme 6-core and Xeon server segments. I'm beginning to draw the conclusion that Ivy Bridge won't serve the high-end market, which would then be left to Sandy Bridge E, save of course for the high-end mobile segment, while the mainstream gets the most out of Ivy Bridge. Then, when Intel proceeds to its next tock, code named Haswell, the high-end market gets first dibs once again as it did with Nehalem, and the cycle repeats.
Hope that made some kind of sense.