There are way too many features to count on this - but you can be sure that Cathy Pountney will be covering them in her SW Fox Session.
That said, some super-useful features that make this not even just an editor but a whole IDE enhancer:
a) Go To Definition
b) Extract to Method - the very easy way to refactor highlighted code
d) Object comparison
e) Design Time event handlers (auto-resizing for one)
If you haven't tried it, there are some videos available but I'll also be doing some for an upcoming post.