Coroutine vs Event driven programming

I think it is coroutines that are "traditional", and events are "modern". However, they also have different purpose; AFAIK, coroutines can either specify where to transfer control (like method calls) or be used to time-share, while events are loosely coupled communication (i.e. communicating "upwards" in a layered architecture).

Be sure to read Eric Lippert's blog series (from October, 2010) about continuation passing style if you are interested in things like these. There is one post titled "Musings about coroutines".