You could say the code editor is the most important feature of any development experience.  After all, that's what lets you create, see, and change your code.  Without a code editor, no other features matter in an IDE.  Around the editor is built the rest of the development environment. Last week , we looked at three new features in Visual Studio 2010: multi-monitor support, multi-targeting, and code navigation.  This week I'd like to spend a little time talking about improvements to the code editor in Visual Studio 2010

See original here: 
VS 2010 productivity improvements, Part II