21% per year? more like 5-15% dependant on app. Were already on 11nm beyond that I'd imagine thing's are gonna slow down big time unless we can find some revolutionary new material or they find some way of doing quantum computing without the need for superconductor level temp's. I did read on wccf that intel are working on a tech that allows many cores to work as a single big core, but I expect it will not work for pa without big engine changes sadly. Also I read that Intel have a team that are there to help dev's make better multi threaded games, The plan (If I remember right) was to help out the triple a dev's in the hope that it would filter down to the indie's.