The AMD Zen 3 microarchitecture is expected to debut sometime in 2020 and going by recent rumors, it could offer IPC gains up to 8% (possibly, more) and up to 200 MHz faster clocks. Zen 3 will also offer 8 cores per chiplet with 32 MB or more of L3 cache. These improvements can further reduce latency and could turn out to be enticing for gamers.
https://www.notebookcheck.net/Intel-should-be-worried-again-AMD-Zen-3-IPC-gains-rumored-to-be-greater-than-8-with-up-to-200-MHz-increase-in-clocks-compared-to-Zen-2.438940.0.html
Zen 2 is pretty nice, Zen 3 sound awesome, but Zen 4... I'm drooling!
Hopefully they'll up their game on GPUs, APUs and laptop components, because they do need a push!