Most VMware customers have virtualized a significant portion of their datacenter. However, virtualizing business-critical applications - databases, ERP systems, email servers, and industry-specific solutions - feels like a completely different ballgame, and the user may wonder whether the risk vs. return ratio is still worth it. In addition, these applications often have app owners that may not be familiar with virtualization. VMware vSphere 5 is the best platform to virtualize all their applications, including business-critical applications. Starting with vSphere 4, and more recently using vSphere 5, customers are virtualizing business-critical applications at an accelerated pace.