Based on my 2 days observation at the Microsoft Global MVP Summit 2013, there is a list of some of the key technologies that will make a major impact in near term
Next Visual Studio Version will be a Major Player
The next version of Visual Studio definitely has many new cool features that will make developers lives much easier (like it's not already).
Visual Studio vNext will require you to have a profile. I guess it will be tracking your work and send feedback to Microsoft :).