A major question that can be asked of any new major technology or innovation is: what is it good for? For this special issue, we invited manuscripts that answer exactly that question in the context of Generative AI and Software Engineering. We received 33 submission, which underwent a rigorous peer review process. This process led to inclusion of 13 manuscripts, which we organized according to McGrath's Group Task typology in this editorial. In doing so, we acknowledge that not all tasks are equal, and we demonstrate the breadth of tasks that GenAI can assist in. This set of curated articles provides a variety of interesting applications and studies of GenAI technology. We conclude this editorial with an outlook on the future.