Pupil dilation could definitely be used for games!!! There are several pupillary analyses that can provide “workload” in near real time. It would be awesome to use this information to mediate the difficulty of AI in order to maintain an optimal level of engagement of expert and novice players. This information could be used as an indicator of training across time… or you could modulate an enemy/boss’s health based on peak workload levels so that your “success” was partially based on the amount of effort put forth in defeating a boss… the possibilities are endless 😀
…but I also understand that you don’t want to cannibalize the primary revenue generator of the company, i.e. the research/analytic products.