In the blog post, Roche said
Oh, the last thing …. We’ve planned to switch to Wayland by default in Ubuntu 17.10, and the Xorg session will still be there. This allows more people to have more time to test, by collecting these feedback in order to let us in the next LTS version 18.04 to make the final decision. All changes will be released in the next few weeks, if you are interested, then you can view all these changes.
Roche said there will be a lot of adjustments, including the global menu, HUD, Alt tag behavior, information menu, volume notification, running applications and so on.
