People will be freed from the absurd requirement that we communicate with software by typing and using a mouse. We don't communicate with one another this way, so why should we do so with software?
We have shown that it is credible for a drawing medium to exist that understands what you are sketching, and can then assist with the task in some way,
People clearly reason spatially and with images as well. We think it will be important for computers to be able to do the same.
Not only should I be able to watch things happen in my electronic physics textbook, I ought to be able to tinker with the diagram they have drawn and try out other possibilities.
The unanticipated uses are almost always the most interesting.