Newsnight's Paul Mason makes some valuable points about the future of rolling news -- the very area that BBC TV news chief Peter Horrocks has put at the centre of his agenda.

Mason argues that the studio-led 24-hour news channel will soon be obsolete, replaced by a broadband convergence of on-demand video, audio and text.

I suspect the actual 24-hour news service that emerges in the future will be somewhere between the existing format and Paul Mason's vision.

The rolling news channel will remain, but will become more of a "stockpot" for incoming material.

The lives, packages, interviews and -- increasingly -- user-generated content broadcast on the channel will be cut up and made available in interactive bite-sized chunks for viewers to compile their own running orders.

Access to background resources and archive will become an integral part of the experience.

Crucially, the concept of headlines -- the three biggest stories of the day -- will become less and less relevant. Viewers will select the stories they're interested in for their DIY, on-demand news bulletin -- and not the ones an output editor thinks they should be interested in.