The relationship between the top management and IS has been the subject of several research studies for over 50 years since this relationship is often inefficient and prevents the effective use of IS in many organisations. This inefficient relationship is often denoted as a gap between both sides. Despite significant efforts to bridge this gap, it is still present in many organisations and several of them are not sufficiently aware of its consequences. The aim of this paper is thus to present an overview of this important research topic and to examine the research impact and its relevance. The business-IS relationship was selected since this topic has been one of the core IS research areas in the last decades; and therefore, it is reasonably to expect that the research had an important impact among wider audience. Unfortunately, it is not the case. The paper thus presents a literature overview of the business-IS gap, a preliminary impact analysis, its possible implications and the future research possibilities.