There's no question that cloud computing will be the trend to alter organizations' infrastructure the most over the next few years, especially as firms transition from basic server virtualization to the private cloud. But today these environments are still relatively immature, acting as two distinct entities; applications are deployed in one or the other. But private cloud will not be the end of the road for cloud computing. Over the next three years, leading edge IT shops will start blurring the boundaries between public and private IaaS environments, so that applications can move between them based on immediate needs and economics-known as hybrid cloud. Enterprise architects can begin planning for this now by creating a road map that lays out the necessary capabilities for a hybrid cloud and using these to evaluate the capabilities provided by today's vendors and products.