Back late last year, Collabora developer Alexandros Frantzis blogged about a whole lot of work going into getting full Wayland support for Wine and now a big first step towards it being included in Wine is happening.
Frantzis has now put up a Merge Request, to have the first of many parts begin to be included in Wine. This first part "introduces the Wayland driver PE and unixlib components with some basic code, and prepares the makedep tool to be able to handle Wayland protocol files".
So right now, it's not too exciting for end-users but a big step in the right direction and will lead to more being included, to then eventually having a full Wayland driver for Wine included. Frantzis mentioned Part 2 will include "basic Wayland wl_output (i.e., display) events and populate the Wine monitor information".
It's being done in parts since it's quite large and their goal is just to make it easier for people to review the code and suggest improvements as they go along. Seems like a sane idea.