Yesterday at Connect(), the latest version of TFS was released.
Some of the new things to mention are:
Build-in Wiki for your teams to create a single entry site for help and guides.
Git Forks, so you can have forks on your main branch
Large scale of Git support, what Microsoft calls GVFS, for large scale Git repositories.
TFS 2018 will no longer support XAML based builds and lab management (MTLM lab part).
More info about the release will come… Stay tuned