advertising marketers would know which content on a page was most interesting, and the provider could push targeted ads based on that interest.
time spent on site websites would redesign their content dynamically to maximize the length of your stay on a site.
That second prospect is also scary: the internet is already known to be a time-sucker if you can't control yourself. Imagine how addictive it would be if facebook and google started adding those tactics!
How Eye-Tracking Technology Can Ensure You Never Look Away
Over the past several decades, computers have evolved to become ever more sensitive to our cues. Room-sized machines controlled by punch cards were gradually replaced by desktop computers hooked up to…