People who are unable to communicate physically - and their loved ones - probably feel differently.

Can you imagine the sheer horror of being stuck in your body and unable to communicate? Being literally incapable of telling someone that you're in pain or where it hurts, for every waking second? Or, knowing that the end is near, not being able to tell your children that you love them? Or that you're sorry for not being a better parent?

May none of us ever need such technology.