Adobe and Fast Company Introduce the Future of Digital Publishing

Fancy looking stuff. But what is this app doing that a website couldn't do? My sqaurespace site does most of what they showed off in the video.

I think a lot of people forget that since the very first iPhone, you can pin a website on the home screen, and it'll act like an app. I know adding a rich offline sync/cashe to all websites Safari hits would be a serious drain, but what if Apple implemented it for pinned sites? For example, you pin sawyerpaul.com to your home screen, and Apple will automatically download an arbitrary amount of posts while over wi-fi. Doing so would help speed and mobile bandwidth costs. Wouldn't that essentially make an app like this obsolete?