I guess the first answer to this question is simple - "why not?". Plenty of things are done with no good reason, and I intend to keep up this tradition.
However, I do see a place for mechapoint. There are now a number of open-source presentation programs, but they seem to sit in two main groups: large (and often buggy) applictaions focused on creating presentations such as OpenOffice or kpresenter, and small apps like mgp that display presentations written in a text-based syntax. While I realise that the thought of not having graphical tools is frightening to some people, these days I feel much more comfortable writing a document as DocBook XML in vim than trying to navigate a GUI word processor like MS Word, and I'm sure a number of developers feel the same way.
mgp has been the presentation tool of choice for Unix people for a number of years now, but it's definitely starting to show it's age. While it has a lot of great features, it's graphical capabilities are hardly state of the art - text and gradients look jaggy, and animation is jerky. Something that combined a nice text-based markup with a slick graphical engine could work quite well.