The Evolution of Identity & Access Management

Identity and access management is going through a renaissance.  Organisations, both public and private have spent thousands of hours (and dollars) implementing and managing infrastructure that can manage the creation of identity information, as well as management of the authentication and authorization tasks associated with those identities.  Many organisations do this stuff, because they have to.  They're too large to perform these tasks manually, or perhaps have external regulations that require that they have a handle on the users who access their key systems. But how and why is all this changing?