yes, there is going to be machine learning and analytics processing.. Eventually rules would be suggested to you, and some rules would take advantage of all the information that has been learned about your account
This may be overkill for some people, but if everyone could just easily scan from and subject columns then there wouldn't be a global email epidemic that lots of people are trying to solve. Tray is trying to allow you to define how you use your inbox, rather than assuming that your like the next 100 people...