FreeBSD is making some progress on supporting Wayland/Weston as an alternative to running the X.Org Server.
Wayland support on BSDs and other non-Linux platforms has lagged behind, but Johannes Lundberg is one of the FreeBSD contributors working on getting things into shape. Besides Wayland/Weston support itself, it’s also a matter of the DRM drivers being ported from the Linux kernel being in less than ideal shape generally compared to the upstream kernel code.
Developers of FreeBSD are making strides in Wayland support for FreeBSD. Wayland is a display server protocol that specifies communication between display servers and clients. Check out the discussion at Phoronix in the link provided.