I am currently making a presentation about relational aesthetics which i think fits in with the idea of audience interaction. Not so much interaction between the audience and the art but interaction between the audience inside of the art. This contemporary art practise relates to issues and problems that artists see in todays society. It came about with the age of consumerism and digital networks. Both of these comodify the interaction between people. I think the quote from Nicolas Bourriauds book 'Relational Aesthetics explains this well...

'You are looking for shared warmth, and the comforting feeling of well being for two? So try our coffee'

This is a simple example of the interaction of people being comodified. Going for a coffee to meet friends is hardly giving into comodification of relationships, but its the fact that it happens everywhere, at all times that worries contemporary artists. They see it as their job to stop this from happening, by inviting people into their work. With this, audience interaction is essential to the work- without it, it would cease to exist