No you don't control the set-top Android TV box with your mind - you use a controller!
Android Police reporter Artem Russakovskii took a photo of it, having bagged himself one at the Google I/O event.
The controller's thumbsticks are parallel, like the DualShock 4's, but the overall shape of the pad and the face buttons are of an Xbox One nature. Specific hardware features are unknown.
Russakovskii said this was a developer kit edition and was unlikely to be sold, as pictured, to the public. The Android TV unit has an HDMI-out, USB and network port.