Recent advances in consumer networking and emerging technologies are promoting a paradigm shift in the way environments such as entertainment, home automation or e-Health are traditionally understood. However, available technologies present different characteristics depending on the environment or the working domain that, in a context of non-experienced users, hinders the development of interoperable services. This article compares the most recent technological proposals and analyzes their key points, and presents a compilation of the major interoperability proposals and initiatives for the considered communication domains. The work is completed with a reasoned discussion on trends on architectural approaches to cross-domain integration that can be used to overcome the issues generated by the segmented ecosystems presented above.