I tend to look at it as a new business communication design language. When you give people simple building blocks they end up doing great things with it. Look at Lego. Look at Twitter. Constraints actually drive creativity.
Engineers used to just design for machine/system constraints. Designers used to just engineer for human/social constraints.— John Maeda (@johnmaeda) September 30, 2013
I can see the confirmation that it works in the behaviour beta users. Advanced designers who are looking for the most advanced features miss certain functionality (but hey, check out that automatic light to dark background conversion). Some people are confused by the user interface which is radically different (read much more simple) than PowerPoint. But the user who makes a first effort to go through the dip and actually makes a presentation for real is hooked.
I could have written a book, created a training program, but I thought I would never get the reach that a web based tool could give. Hence the presentation design app SlideMagic.
So the ambition is not to remove PowerPoint from corporate desktops, it is bigger than that. The ambition is to change the way people talk to each other in business.