One of the common themes that has arisen out of my research so far is that even Mac users tend to use PowerPoint (rather than Keynote for example). When I asked why, this is because it is compatible with other systems, what people are used to, and/or because the software is supported by their institution. One approach would be to find faster, more efficient ways, of using PowerPoint for images and moving images; another approach may be to try to add additional functionality to PowerPoint.