The AMD keynote for this year mainly revolved around the announcement of the Radeon VII GPUs. However, the company's CEO also revealed that the third generation of Ryzen desktop processors would become available soon. There was not much additional detail given on this new CPU line, besides that it is definitely of a 7-nanometer architecture.
https://www.notebookcheck.net/AMD-CEO-announces-that-3rd-gen-Ryzen-processors-exist-and-that-s-more-or-less-it-so-far.393291.0.html