The British Broadcasting Company has made a request for contributions to an open standard to be made, for the distribution of audio and video, both offline and real-time broadcasting. Their plan is effectively to act as the mediator between box manufacturers and content producers, with themselves as one of the content producers, but definitely not as set-top box manufacturers.
Challenges faced include an assumption that it is reasonable to expect ISPs to insert cacheing boxes on their premises, and an assumption that "downloading" - especially at high speed - is "the way to go". Also, there is yet again the risk of some idiot content producers trying to DRM an open standard.
This article will provide some answers to these tricky issues, and they're not all "Technical" answers. For the most part, the solutions are psychological, and take comfort in the fact that most users are ordinary people not interested in blatant copyright theft, they just want to watch stuff. Ultimately, content producers are going to have to get used to the fact that they are simply going to have to trust people.