1. More often when we are in the internet during social networking, we want to have multiple websites to be open, similar to the multiple chat windows. It would be good to have a PIP (picture in picture) concept in navigation. We can kee[ track of whats happening in multiple windows within one screen.
2. A web cam which can be multitasked. We can have to switch between 2 or more threads to display different users to different friends. This depends on the target users with whom we are interacting.