Switch from X to Wayland won't happen in a Debian point release. So far I haven't heard anything about Debian's Wayland switch although a test Live CD ISO has been made available back in October 2016 -> http://www.phoronix.com/scan.php?page=news_item&px=RBOS-Octo...

Right now, the only Linux distribution ships Wayland display manager by default is Fedora 25 (I am running it on an old Latitude D630 with NVIDIA GPU -> KDE Plasma 5 ;-).