Powerpoint is the only reason why I have a windows virtual machine, and I wish I could completely delete it from my computer, but powerpoint is just too convenient to use. However, after discovering the beamer mode in texmacs, I found myself really enjoying the more structured approah to creating slides and the natural way of typing equations. There are three features which I think would make me use texmacs exclusively over pointpoint and never look back:
Animations and a seemless way to synchronize them. In powerpoint, you select an object, choose an animation (for example, appear), and synchronize it in time relative to other objects on the same slide. This is so important as it can help the viewer concentrate only on a small portion of the slide at a time.
Ability to draw shapes over figures.
Ability to reorganize slides without copying and pasting. This is such a fundamental feature that it’s a surprise that it’s not a native feature.
There are other things which would be nice to have (like more themes), but these three features would make texmacs a compelling alternative to powerpoint.