It depends. For me this is about being future proof.
Its more secure than X, but you can compartmentalise as well via VMs (Qubes does this) or Docker (Jessie Frazelle runs everything in Docker).
Enlightenment [1] supports Wayland since E20.
If you use i3 right now, you can use Sway [2] as drop-in replacement. That's my plan (since I use i3) if I might some time.
SailfishOS [3] also already uses Wayland. Tizen apparently does as well. SailfishOS doesn't use profiling or ads, and has an Android compatibility layer.
KDE and Gnome might as well (according to [4] they do); I don't use those.
[1] https://en.wikipedia.org/wiki/Enlightenment_(software)
[2] http://swaywm.org
[3] https://en.wikipedia.org/wiki/Sailfish_OS
[4] https://en.wikipedia.org/wiki/List_of_display_servers#Waylan...