About the size--its not meant to be an ebook reader, it's for productivity. It comes with Microsoft Office, which I feel would be a pain to use on a smaller device. This is more to bridge the gap between laptop and tablet, which is why it offers that keyboard.
The Pro has full desktop support and can run real programs, right? Like, Photoshop CS6? I'm probably not going to get it at this point, but it is a step in the right direction. Maybe in an year or so when marketplace develops and a better device is released.
The RT is kind of overpriced for what it is, and I don't like that the keyboard is an extra $100 when they advertise it in all the pics--as if the device isn't complete without it.
(quick question--anyone known if the pro can also run android apps, or is it stuck with whatever windows has?)