So what can the seemingly unconverged interactive mediums do for TV? Here's a killer example from two top innovators in their class. Current TV (user-generated US cable TV channel) and Twitter (micro-blogging platform, occasional whale-endorser and increasingly popular service despite many still saying 'what's teh point?') have teamed up to reshape the feeling of the presidential debate broadcast.

As the two candidates go at it, Current will be streaming all topical Twitter posts (those that start with #current) across the screen. This is a cost-effective way of aggregating and broadcasting opinion in real time, and to a limited extent, offering participation to a global audience.

Now of course it would be better if you could prod and cause semi-temporary injury to the protagonists with some kinda web-to-machine responsive environment. Then I'd feel involved. But still it's a start.

This might not be suitable for all TV shows but if there are a bunch of viewers out there with opinions about what they're seeing, chances are their fellow viewers would find that content interesting. It would be more decipherable if it were mashed into into some form of aggregated opinion rather than simply free-form but there's also something raw and human about a blurted thought. Hopefully we'll continue to see similar forms of companion content experimentations across news, drama, comedy, sport and lifestyle (eg shoes..) programming. It might not be shown on the TV screen, but even if it's running in an adjacent way on mobile or laptop it still has incredible potential.

NB. I think the first time I ever experience converged programming like this was listening to Roy & HG's superior Grand Final call on the radio whilst muting Sandy Roberts and Peter Landy. Good times.