What in Winnicott's theoretical matrix was truly revolutionary for psychoanalysis?

Introduction. Part I: Introductory Overviews. Winnicott, D.W.W. On D.W.W. Ogden, The Mother, the Infant and the Matrix: Interpretations of Aspects of the Work of Donald Winnicott. Abram, The Evolution of Winnicott's Theoretical Matrix: A Brief Outline. Loparic, From Freud to Winnicott: Aspects of A Paradigm Change. Part II: Personal Perspectives. Winnicott, A Personal View of the Kleinian Contribution. Milner, Winnicott: Overlapping Circles and the Two Way Journey. Green, Potential Space In Psychoanalysis: The Object In the Setting. Faimberg, Nachträglichkeit and Winnicott's Fear of Breakdown. Ogden, Reading Winnicott. Widlöcher, Winnicott and the Acquisition of Freedom of Thought. Wright, The Search For Form: A Winnicottian Theory of Artistic Creation. Roussillon,Winnicott's Deconstruction of Primary Narcissism. Part III: Late Winnicott Studies. Winnicott, The Use of An Object In the Context of 'Moses and Monotheism'. Abram, D.W.W.'S Notes For the Vienna Congress 1971: A Consideration of Winnicott's Theory of Aggression and An Interpretation of the Clinical Implications. Goldman, Vital Sparks and the Form of Things Unknown. Reeves, On the Margins: The Role of the Father In Winnicott's Writings. Thompson, Winnicott and American Psychoanalysts. Farley, Squiggle Evidence: The Child, the Canvas, and the 'Negative Labour' of Writing History.