Constructive Technology Assessment (CTA) aims to involve a multitude of stakeholders in discussions involving technology. However, all technological assessment is mediated through concepts. Development of concepts regarding technology rich futures has been lively but confusing for many stakeholders. Utilizing bibliographic data from Web of Science, this article overviews and discusses ten influential concepts that have played an important role during the 2000s. It is argued that the lively and dynamic concept production leads to numerous problems for a CTA approach.