I think you mean 'tick' for a die shrink, which is Denverton, and is supposed to have "more cores and more of everything". 'tock' refers to a new microarchitecture, and the details on the generation that will follow Denverton haven't been announced yet.
There's also going to be the Broadwell SoC, which will fit somewhere between Denverton and E3 v4's.
http://ark.intel.com/products/77988/Intel-Atom-Processor-C27...
I have one of these sitting on my desk with an m-sata SSD. It compiles emacs just as fast as a R510 with 2 X5570s @ 2.93GHz.
When Intel goes 'tock' on these this Summer and manufactures them in 14nm rather than the current 22nm, the power consumption will drop even further.
and then there is Denverton. :-)