There are a number of places you can go to find out more about the next release of Revit, as well as all the other Autodesk products.
These are Revit focused links:
Autodesk Revit 2014 (Autodesk's own site)
Autodesk's WikiHelp What's New
David Light's Blog Post
LMGTFY (Google Search)
There are lot's of ancillary blog posts about new features as well. The release of the software will be, if like previous years, staged over the next 3-4 weeks.