PowerPoint in the browser uses a different web engine than PowerPoint desktop, therefore PowerPoint in the browser has all the possible features with VizSlides such as saving filters and parameters, and embedding Tableau Dashboards natively. Because of limitations in PowerPoint Desktop, we are using an innovatie streaming service to enable live and interactive Tableau Dashboards in your PowerPoint presentations. Because of this, saving filters and parameters is currently not available in PowerPoint Desktop (yet).