PowerPoint, Google Slides are presentation tools that most of the time are actually not used as presentation tools. Rather people use them as a visual collaboration tool. The organization chart that needs to go into the deck forces the issue: it is time to agree on where the boxes sit and which lines (dotted or straight) go between them. The tiny footnote is essential to agree the strategy for the North America entry strategy etc.

The visual character of these programs makes them more useful to do this than word processors. Online collaboration adds another option to manage multiple pens in one document. Comments give a system to manage todo lists.

SlideMagic on the other hand is a presentation tool.

Image credit: Jay Cross on Flickr