@david_chisnall This is a pre-competitive collaboration between all the major suppliers and institutions that sets out all the difficult challenges that must be overcome across the next 15 years, in order to continue to scale at the same rate, and which identifies technology requirements for each stage of that progression.
It is freely available, so to understand what the next 15 years looks like, one only has to go to https://irds.ieee.org and read it.