From the first look, it seems that the onscreen keyboard in Windows 8 cannot be moved from its default position at the bottom of the screen:
However, sometimes it obstructs the input field and should be repositioned (see iOS 5's screenshots for examples)
So the question is, can it actually move? If it can, how can I do that? If it cannot, is it possible to use the keyboard to fill an input field that is underneath it?