I dream of such a device to learn feelings of animals! Freedom of choice must be a privilege not only of people, but of animals as well.
Why do we force animals to live, for example somewhere, where they probably have not a mere desire to live? Of course, they do not speak and it is impossible to understand, whether my cat wants to go away to so sweet wild, or prefers to stay at home? Just as it is impossible to understand whether my cat feels bad and where exactly does it hurt? I dream to have a device that would decipher animal's emotions and translate it into human language!