Automatic UI generation
The reflective architecture of Objective-Smalltalk gives full access to obect structure information, allowing basic CRUD user interfaces to be generated automatically like WebObjects Direct2Web or Naked Objects.
However, the metadata can be seperated from the objects and created, processed and modified independently. This not only means that UIs can be adapted without having to modify the model, but also that UIs can be created without having model objects at all.