The WSJ also has an article about the limitations of Moore's Law which is behind a paywall.
http://www.wsj.com/articles/moores-law-runs-out-of-gas-1429282819?mod=WSJ_hps_sections_business
Key points include:
Intel 4004 in 1970's had 2300 transistors
Intel Core i5 2015 has 1.3 billion transistors
Intel Specialized chip late 1025 8 billion transistors
Issues include cost and reliability.
A 65 nanometer chip in 2005 cost 16.4 million to design
A 14 nanometer chip in 2014 costs 131.6 million to design
Micron's Chief Executive thinks that at some point improvements will only be cost effective [my interpretation] for smaller and smaller markets.
NAND chip makes are worried that reliability will suffer and have stopped shrinking transistors and are moving to stacking technologies.
