I am in the target market for this and something disturbs me. It looks so great and neat that I wonder what will happen to the noise to signal ratio. I am not exactly the Buddha in terms of concentration and the last thing I want is to be plugged into an interactive environment (the app itself and the iPad). I'll play around, have urges to read a million things at a time; do quizzes; watch videos; write notes to share instead of writing them to learn and in general do everything on it, but learn. What makes it even more dangerous is the fact that it
looks like I am learning something.
That's the problem with a lot of products I see. It's not that I don't have a use for them. It's the fact that I don't want to get used to them. Sometimes, the bare bones is just how things should be. Of course, it's awfully convenient to have things in this package, but it won't serve the purpose that well.
This is why I plan to buy the color kindle someday, if they come out with a decent system to take annotations. It scratches my itch for books with an occasional physics/ math/ computer text, while offering me an environment I can curtail. Hopefully, someday I will have more fine tuned control over myself, but until then I plan to stay away from such things.