I have carpal tunnel, and holding down keys to walk and move can be very rough on my hands and arms.
Many games I play use hotkeys to toggle walking on or off, so your avatar can move without you holding buttons down.
Many also use mouse steering so you can turn yourself left or right simply by moving the mouse left or right while moving, and again not need to hit any buttons.
These two things together are a great help to the carpal tunnel folks like me, and I'd love to see them implemented here in sansar. :)