I already posted this, but then I deleted it, but I think I'll have to deal with this comment being potentially useless. So,
Those movies where everyone's waving their hands around to do everything is actually bad design, though it looks cool.
Place your hands in front of you, with your arms parallel to the ground. Now, move your forearms up and down. Do that for the next 10 minutes or so. You probably noticed that you didn't last that long, or if you did your arms feel like lead. Now imagine doing that all day every day. It wouldn't work out.
