When some people still can't even use a mouse properly (taking 10 seconds to close a window etc), I wonder how they expect people to learn to use more than thre

When some people still can't even use a mouse properly (taking 10 seconds to close a window etc), I wonder how they expect people to learn to use more than three fingers in coordination. Most of us don't even bother using mice because it's so inefficient anyway (unless you're doing something graphical). Nice demo though.