From a data perspective this really interests me and partly because I am a gamer. As the rise of eSports continues, obtaining metrics of professional players might give us insight into what traits professional players have in common (if any).
We track metrics of olympic athletes to study where they can improve and what makes a good athlete great, so it only makes sense to see if there is a link between heart rate, eye movement and other metrics and a professional gamer who has what it takes to win.
This is surprisingly cool. I probably wouldn't buy one, but it is cool nonetheless.