“We will be embedding audio, video and streaming in to everything we do. The .epub format, which is the standard for ebooks at the present, is designed to support traditional narrative text, but not this cool stuff that we’re now talking about.
“So for the time being at least we’ll be creating a lot of our content as applications, for sale on app stores and HTML, rather than in ebooks. The definition of the book itself is up for grabs."
Check it out to see a video demo.