I really don't understand: how is this article different from the story posted on http://news.ycombinator.com/item?id=2089570 http://news.ycombinator.com/item?i

I really don't understand: how is this article different from the story posted on http://news.ycombinator.com/item?id=2089570 http://news.ycombinator.com/item?id=2089570? (Apart from being slides vs no-slides)