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.
BSD -- 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.

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