New Calvinism: New Reformation or Theological Fad?

In recent decades, there has been a shift in the landscape and focus of the Church. Topics such as the Sovereignty of God and humanity's utter helplessness without him have become more widely appreciated. Books are being written and conferences attended in their thousands. This apparent renewal of interest in grappling with Scripture has created a movement labelled as New Calvinism. But is it really any different to old' Calvinism and will it be of any lasting benefit to the Church?