I'm not sure if the is the name of the inteface class. In build 2250 (4.5.3) it is called com.intellij.openapi.roots.a.b.n.
The real name is probably com.intellij.openapi.roots.ui.configuration.ModuleEditorsProvider
The reason I think this is a good idea is because it will allow a ModuleComponent that implements this interface to add tabs to the module configuration editor. This will make a module oriented plugin configuration very natural.
I am working on a plugin that builds jar files (something I always felt IDEA was missing) for a module so I don't have to write a small ant file for each module I want jar'ed.