Its just another Xorg/X11 feature that overrated Wayland does not have.
It works the same on FreeBSD and Illumos - its not limited to Linux in any way.
Below example from my http://vermaden.wordpress.com/freebsd-desktop setup.
- https://pbs.twimg.com/media/GChSlZHXIAEgT8T?format=jpg&name=...
- https://pbs.twimg.com/media/GChSlbFWUAA0x6G?format=jpg&name=...
Regards,
vermaden