Carpal tunnel is probably easier treated than supraspinatus tendonitis.
I think there needs to be another user interface besides the keyboard and the mouse.
When I watch the videos I think either the mouse is either faster than the finger demo or it could be faster if you tweaked the way the mouse works. ie. like this:
if the keyboard had a new "super mouse" button, if you held it, it would perform the turn clockwise/counter clockwise if you moved left and right and perform the zoom in/zoom out if you moved up and down with the mouse.
There you go, we've eliminated most features of the multi-touch.
I think this interface would help mouseless / keyboardless devices ... but that's it !
I'm working at half mast today, I think my ESR is higher than Grahams :( Dx: URTI vs. Flu.