One of the most interesting new features of Visual Studio 2017 (for me at least), is Live Unit Testing.
Now, I am a user of NCrunch, which allows a *really* productive workflow for Test Driven Development (TDD) - continuously running and displaying unit test results and code coverage inside the editor itself.
But, was a little bit niche. The new VS 2017 offers a very similar visual experience to NCrunch, and takes it mainstream. (Enterprise SKUs only). I'll leave the video below to explain for those who have not yet encountered this type of workflow: