Yes, the socket thrashing by Intel is a bigger problem.
You'll probably have an interesting time updating an LGA2011 in 2015, never mind the RAM.
That's beneficial for those who will want to upgrade - once the new sockets are out, the prices for the previous generation chips will go down - you can potentially upgrade from the base quad core to a six core processor, giving it a good boost in performance.
That has almost always been a problem. Even in the past when you could keep socket for 5 years, the chipset on the motherboard was limiting you upgradability to processor of the same generation.
The new Mac Pro, provided it's socketed, would be on LGA 2011.