You could have a chording keyboard as a transparent overlay on a multitouch tablet instead of having a representation of a physical keyboard taking up a large part of the screen.

With a software-physical-keyboard it has to be visible as there are so many small keys to precisely hit, but with a software-chording-keyboard there could be a few sketched lines where each finger could press.

One day I'll get round to trying that in-browser with multitouch JavaScript...