By 13.10 we've got a wide selection of scopes, an easy way for developers to create new scopes and the smart scope server that returns ever more relevant results. While this is great, it's not yet there where it should be. It's still missing better browsing capabilities (to refine searches), e.g. support of departments, embedded filters or links to relevant other scopes or results of other scopes. Also, the display capabilities of both the result page/categories/dash and the preview are quite limited which does not always allow scopes developers to visualize the results in the best meaning content sensitive manner.
Goal is to resolve all those shortcomings for 14.04 Unity 8. Unity 7 will not benefit from those improvements from UI/usability point of view. Focus is on Unity 8 and phone.