In this video from 2015 Stanford HPC Conference, Rich Graham (HPC Advisory Council), DK Panda (Ohio State University), and Addison Snell (Intersect360 Research) weigh in on the outlook for Exascale Computing.
Exascale computing refers to computing systems capable of at least one exaFLOPS, or a billion billion calculations per second. Such capacity represents a thousandfold increase over the first petascale computer that came into operation in 2008. (One exaflops is a thousand petaflops or a quintillion, 1018, floating point operations per second.) Exascale computing would be considered as a significant achievement in computer engineering, for it is believed to be the order of processing power of the human brain at neural level (functional might be lower). It is for instance the target power of the Human Brain Project.”