AMD's recent Accelerated Data Center Premiere Keynote has served to confirm the existence of next-gen products such as the server-grade processors known as EPYC Milan-X. These CPUs are much like those of the previously-unveiled third-gen series, except with 3D V-Cache technology. Their successors were also outlined in more detail.
https://www.notebookcheck.net/AMD-previews-the-EPYC-processors-to-come-with-the-new-3D-V-Cache-upgrade-and-more.578336.0.html