"Eye-Controlled Interaction" for your GUI coming soon {Engadget}

Oct 3rd 2006 6:44PM "You could even control a kitchen display showing recipes or other information when your hands are busy or covered in ingredients."

and

"who need both hands free to carry out their work."

The above statements imply that one would be able to perform these tasks simultaneously. I would have thought that controlling the said display would involve some sort of effort/concentration - like moving the pointer to a button for example. Wouldn't voice activation be alot more convenient in this scenario?