Now I think that the Move has a genuine advantage in a game like portal over a joystick, the bane of games like portals on consoles is the lack of precise rapid movements, a good gamer with a mouse can spin around 180 and shoot an accurate portal mid air in a second, trying that on a console would be next to suicide, however, the move might be able to help there, giving an ability to rapidly turn around as well as precisely aim. Hell I think it could almost be more fun to use the Move than a mouse as you could almost pretend that your flying around yourself.