The plan is to offer other Prism enabled apps/services in the future. Video is a bit tricky because all of the web traffic has to bounce off of our hosted server. That isn't a problem for Indigo style Control Pages but could chew up quite a bit of bandwidth ($$) for video. But we'll figure out something.
Additionally, we have other additional features planned for Prism as well. But its main purpose is to provide easy remote access to your home Mac. Configuring routers, Vonage adapters, Airport base stations, firewalls, dynamic IP address discovery, etc., can be quite a chore. And the worst part is, it is dependent on your hardware, ISP, and network topology so there is no single solution that works for everyone. Except Prism that is!