good read at the below link, but its first comment* was interesting, so I'll re-post that here.

http://semiengineering.com/will-7nm-and-5nm-really-happen/

GLTA,

R.

* comment was possibly from one of the folks in the Photonics Group at U Bristol

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"IC manufacturers continue to announce new generations, 45 nanometer, 32 nanometer, 22 nanometer, and coming soon, 14 nanometer, though in fact we have been stuck at 64 nanometer for quite some time. There have been process improvements, but these are incremental improvements. The line pitch remains 64 nanometers. We cannot actually build circuits smaller than we could eight years ago. That these are improvements is no lie, but to label them by a size is a lie. If they had said “second generation 64 nanometer” instead of “45 nanometer”, if they had said “third generation 64 nanometer instead of “32 nanometer”, then they would have been speaking truth, or at least speaking hype rather than lies."