Key criticisms: "gestures cannot readily be incorporated in menus: So far, nobody has figured out how to inform the person using the app what the alternatives

Key criticisms: "gestures cannot readily be incorporated in menus: So far, nobody has figured out how to inform the person using the app what the alternatives are." "Accidental activation is common in gestural interfaces, as users happen to touch something they didn't mean to touch. It may not even be obvious what action got you there. If a finger accidentally scrapes an active region, there is almost no way to know why the resulting action took place. The trigger was unintentional and subconscious." "When a mouse is clicked one pixel outside the icon a user intended to activate, the mouse pointer is visible on the screen so that the user can see that it's a bit off. [On a touch screen] Users frequently touch a control or issue a gestural command but nothing happens because their touch or gesture was a little bit off. Since gestures are invisible, users often don't know that they made these mistakes." "When users think they did one thing but "really" did something else, they lose their sense of controlling the system because they don't understand the connection between actions and results. The user experience feels random and definitely not empowering."