I never thought I'd say it but it seems that they are getting close to the end of the line feature wise! Not a lot here that is making want to upgrade from 12...
Drop me a line at robert(dot)demmer[at]jetbrains(dot)com if you're willing.
IntelliJ is awesome :)
C/C++ IDE, try subscribe to preview: http://www.jetbrains.com/objc/features/cpp.html
My impulsive purchase on the 21st December 2012 was the best thing I did that year.
It's the refinement in every release that makes IntelliJ so great. That, plus their support of Kotlin, made upgrading to 13 (Ultimate) a no-brainer for me :).
Great job Jetbrains. Although I'm primarily a .NET ) developer (have resharper of course, I make sure to have the latest IDEA because it's such a great IDE