Command-line interfaces seem to involve two main parts. The commands themselves (ls, mv, rm, and so on) and the arbitrary parameters supplied to them (all files

Command-line interfaces seem to involve two main parts. The commands themselves (ls, mv, rm, and so on) and the arbitrary parameters supplied to them (all files with the .txt extension or compiler flags). For the former hand gestures would work well since there is a limited and well-defined set of commands, the latter would be better served with a regular text input. Even here the distinction gets blurred by commands created by applications you install yourself. A combination of the two with instant switching between the two modes would be nice. But that still seems like an uncreative solution.