BBC4 programme, Ancient Greece: The Greatest Show on Earth, Dr Michael Scott shows how theatre evolved along with democracy. It's well worth a look.
This also hints at how the performing arts and the media may benefit from Interactive Democracy: when people are engaged and empowered their appetite for these arts may also swell.
Some may balk at the power this gives to playwrights. I don't. It is merely one of many possible inputs into your decision on how to vote.