Besides the upgrade to the Zen 3 architecture, one of the only other changes listed on the slide is the upgrade of the Inter-Chip Global Memory Interconnect (xGMI). The current Threadrippers do 16GT/s while the upcoming "Chagall" parts promise 18GT/s. This is similar to the EPYC 7003 series "Milan" server processors.
According to the latest rumors, Threadripper 5000 could debut in August with availability expected in September.The series are to offer up to 64 cores and 128 threads, but SKUs with 16 cores are supposedly also considered. Full specs of Chagall have not yet been confirmed though. -- VideoCardz