I'm sure the answer to this will become available as we get closer to the preview announcement date. Microsoft will likely write a blog or something about it that will go into detail. Very excited to see what the future holds for Windows.
As much as I like Windows 8, there's definitely some major issues that need to be addressed, and now more than ever, I feel like Microsoft is absolutely aware of that, and how the public perceives them. So the feedback before the official release will benefit them in a massive way. And they will listen.