Alexandre Julliard plans to freeze the Wine 4.0 code on December 7th, and once the code freeze begins, there will be a weekly Wine 4.0 Release candidate versions. If all goes well and like the previous version of Wine in the past, Wine 4.0.0 should be released in January.
This year, Wine has achieved good results in stability with the support of Vulkan. Improvements to running games under Wine, FreeType sub-pixel Font rendering, Wine Direct3D defaults to OpenGL kernel context, better shell auto-completion, improved support for HiDPI, Direct3D is supported by default CSMT, etc., as well as a number of specific fixes for apps/games.
All in all, Wine 4.0 should be a very good release, especially for gamers.