Non-Technical Summary. Powerful influences on societal knowledge, values, and behavior, artificial intelligence-infused media systems, new and old, currently reinforce the interlinked problems of inequality and unsustainable consumption. This problem is rarely discussed in environmental research and policy, and even less so how it might be overcome. Discussing this consequential blind spot and the power structures that underpin it, this article argues that sustainability researchers should centrally explore the need and possibilities for democratic reconfiguration of the political economies and charters of media systems to achieve sustainability and other broad, inclusive public goals. Technical Summary. Powerful influences on societal knowledge, values and behavior, artificial intelligence-infused media systems, new and old, currently tend to reinforce the interlinked problems of inequality and unsustainable consumption. This problem is rarely discussed in environmental research and policy, and even less so how it might be overcome. Discussing this consequential blind spot and the power structures that underpin it, this article argues that sustainability researchers should centrally explore the possibilities for democratic governance and reconfiguration of the political economies of media systems to foster human wellbeing and just transformations toward sustainability. Social Media Summary. Sustainability transformations require 'signification steering' and interventions in media systems' configurations.