As far as I can tell, the changes from IDEA 12 are already making their way into the EAP builds of the subordinate IDEs. Certainly it seemed that way from the most recent PyCharm EAP announcement:

http://blog.jetbrains.com/pycharm/2012/12/pycharm-2-7-eap-bu...

I would have said the same until I tried RubyMine last year. Slow, buggy, confusing UX...was glad to be done with it.