natoco :
22nm to 14nm is a big jump % wise for chipsets to account for.
What does a die shrink have to do with pin outs?
Socket 478 went from 180nm Willamette down to 130nm Northwood and GallatinXE Pentium 4
LGA775 went from 90nm Prescott Pentium 4 down to 45nm Yorkfield Core2Duo, which is a much larger step
LGA1156 went from 45nm Lynnfield Core chips down to 32nm Clarkdale chips
LGA1155 went from 32nm Sandy Bridge down to 22nm Ivy Bridge
1150 (LGA and BGA) will go from 22nm down to 14nm
In every case you are seeing a 1/3 or more shrink. And if they wanted then they could stretch out a socket standard much longer. The thing is that they simply do not want to. AMD users always run into the game of having to match not only a socket, but a northbridge, BIOS revision, and a power rating to know if a specific chip will or will not work in a particular motherbaord. Intel tried that with LGA775 and decided that it caused them too many headaches. So on the Intel side all that you need to worry about is the socket and the BIOS. BIOS can typically be updated for support, so it isnt a huge deal. So (with rare exception) if it fits, then it will work for Intel.
Intel is working on more of an SOC design where all of the main features of the mobo and northbridge get built into the CPU itself. Once this process gets further along then it stands to reason that they could make a single socket that lasts for some 6+ years. Because all of the controllers would be on the CPU then you could upgrade the CPU to get the new standard of PCIe or USB without need for replacing the motherboard. If you need more physical connectors on yoru system then you could simply upgrade the mobo without needing to replace the CPU (or a smaller mobo for a smaller system). But then again it could all move to BGA in the end. who knows