I was not sure if it was going to languish in unstable or transition into stretch-testing. Edit - it went to testing.
https://release.debian.org/transitions/html/xserver1.19.html
Notice the status of virtualbox, and the nvidia binaries. I am holding off on dist-upgrade my machine with virtualbox.
edit more xorg
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=831420
xserver-xorg-innput-vmouse has left the transitions page and has left Debian forever.
https://tracker.debian.org/pkg/xserver-xorg-input-vmmouse
Also for old intel gpu - libegl1-nvidia replaces libegl1-glvnd-nvidia
I have dist-upgraded to systems this week, and both are working. Had to reinstall xorg on one of them though. Also I have to confess that both systems were just two base installs with a very simple OpenBox config on top of it. So no fulll DE with all it`s ifs, buts and implications.