Every summer, leading art schools around the world open their doors to the public, offering a first look at the ideas and creative ambitions of emerging artists. This year's graduate exhibitions come at a time of rapid technological and social changes, providing a unique snapshot of how young creatives are responding to the world around them. Michael Voss went to London's Royal College of Art on the opening day of their exhibition to see how their postgraduate students reflect not only personal experiences, but also broader questions facing contemporary society.