I am late to this conversation, and I haven't read the thread the whole way thru. (13 pages.....) so sorry if this has already been said.
Surely it's not a mutually exclusive thing? By that, I mean that the cockpit can be clickable, and at the same time all clickable controls can be duplicated by keys.
I would like to click things on the ground, and maybe in cruise flight. Other times, I would probably use the keyboard command. I can understand that people with more basic setups may not be able to map enough functions through their keyboard, but we don't really know if this will be a problem with SoW or not.
Now I'm sure the poll was raised with SoW in mind, which probably makes this left-of-field suggestion irrelevant, but I'll suggest it anyway.
Mouse Gesturing!
http://en.wikipedia.org/wiki/Mouse_gesture
This is perhaps the most 'realistic' solution of all. (If we are talking about moving your hand in order to move a switch). Years ago I played the computer game Black & White which had this feature and it seemed to work well enough.