Here’s a post from Robert Scoble about the idea of interactive video.

Nat Kausik, CEO of Asterpix, shows me more of the ways that video creators can use Asterpix to add links to certain parts of the video, to interact with the surrounding area, to add clickable areas to the video, and much much more. This is some of the coolest video technology I’ve seen lately and will let us create new kinds of interactive video experiences.

Sure seems like the “thing to do” as more TV goes to the internet and internet to the TV.  Wouldn’t it be cool to be able to click on something “on screen” and see more information about it.  Or maybe have multiple plots or storylines and you could follow which one you were interested in.