You can now create team projects that use Git for the version control system. You can also use Visual Studio with Git to work in a repository that’s hosted on another Git service such as CodePlex or GitHub.
Also, from Team Explorer, you can quickly switch context to other team projects that you’re connected to using the new Connect page.
And, Team Explorer now lists the solutions in your workspace. You can select the solution you want to work on and switch between them easily.
Plus, you can undock the Pending Changes, Changeset Details, and Shelveset Details pages from Team Explorer and open them in new windows.
To learn more, see What's new in version control.