Given the rapid pace of robotics development, can social robots be sustainably integrated into human societies? Could the observed enthusiasm for social robots be merely a novelty effect? To what extent should embodied social robots compete with software-based agents for human attention? Will the current development of machine learning be the motor of Social Robotics? What kind of robotics products and culture can we expect to emerge? These are relevant questions to assess the sustainability of social robots and how they will change business practices and lifestyles. Speculative/exploratory arguments on these topics are possible and have been mostly left out of research papers. This, however, results in an unconventional structure for this paper, where the novelty comes from the questioning of the role of Social Robotics that has not been duly addressed in the literature. The paper (i) presents arguments supporting sustainability grounded on experiments in real-world scenarios, and (ii) identifies challenges according to multiple viewpoints. These are questions for which assertive answers are not found in the literature; hence, the reader is challenged to accept/reject/complement the findings. Besides the answers to the above questions, the conclusions point to pathways we believe Social Robotics can evolve, e.g., incorporating maximal knowledge of how humans work.