One simple example where a good BCI could beat hands and voice every time: window switching. No more task bar, no more start menu, no more alt-tab or window previews or virtual desktops. Just think "firefox" and you get firefox.
If you want an even more hyperbolic what-if, to give you an idea of what we hope is so much as possible, a really could BCI could do away with the concept of windows entirely. Your eyes can only see one thing at a time and the computer can move information to your eyes faster than your eyes can move information to the computer, so just present the user with information as they think about wanting to observe it.
If you want an even more hyperbolic what-if, to give you an idea of what we hope is so much as possible, a really could BCI could do away with the concept of windows entirely. Your eyes can only see one thing at a time and the computer can move information to your eyes faster than your eyes can move information to the computer, so just present the user with information as they think about wanting to observe it.