Okay so today is the first day I've not only found this on Amazon, but the first day I'm testing it out.
Okay so first thing I notice is that they intergraded the Home ebooks with the Archived. Another thing is that you can seamlessly increase and decrease the size of the view for books, which I found very helpful (ie - less scrolling!).
You can also either have it as cover or a list for the way you view it at the home page.
Here is an example of what a book opened and being read looks like in the web page Kindle Cloud format:
Overall, this is a nice touch from Amazon in the way Kindle is use, so I may use it in the near future.