“Using the mind to control a prosthetic arm, a computer game, or a wheelchair are all things one can do today. But a new Indiegogo project aims to make the interface better and translates your mental commands into a computer action.”
The example they show on the site is playing a game using an iPad, where the rotation of a wooden block occurs when the user focuses on it. The user tilts the iPad to change the angle of the rotation. This photo depicts the Muse headband that is used to achieve this control.