Here are a few other new features. If you missed my earlier post of new features its here... AutoCAD Electrical 2013 New Features - Post 1
You can install Autodesk Exchange Apps and other 3rd party Apps for your products. Clicking the button opens your web browser to Autodesk Exchange Apps Store http://apps.exchange.autodesk.com/ACAD_E/2013/en/Home/Index When this was posted there were over 50 apps listed and 28 of them were FREE!.
List of Symbol Libraries included with 2013
IEC Legacy (Millimeters)
Updated Autodesk's Cloud Services Commands
The Online tab will end up receiving its own blog post as some point in the near future. Shown here is a comparison between the Electrical 2012 and 2013 Online tab. It has never been easier to share and collaborate with engineers.
This is really a core AutoCAD change but it affects the Electrical user as well. To see more about this update see John Hackney's post about it here... http://blogs.rand.com/manufacturing/2012/03/autocad-2013-command-line-gets-a-face-lift.html