We currently have Nautilus 3.26 when 3.28 is out since months and we are mostly running GNOME 3.28.
This is being tracked in Debian at: https://bugs.debian.org/901035
The current status is that it is blocked on https://bugs.debian.org/888939 ("gnome-shell-extensions: needs a plan for what will happen to "icons on the desktop" in GNOME >= 3.28")
Reported in Debian: https://bugs.debian.org/901035
heh, beaten by @chris.lamb :-P