For more detail you can go to SAP Note 2052912.
The Virtual Compute Appliance is a great, cost effective, easy to deploy converged infrastructure solution. Installations can be done by the customer, it takes just a few hours to bring up and start using a VCA system and deploy applications. The entire setup is pre-wired, pre-installed, pre-configured, using our best practices. All the software and hardware components in VCA are standard off the shelf, proven, products. Oracle Linux for the management node OS, Oracle VM for the compute nodes. Any application or product certified with Oracle VM will work without change or without the need for re-certification inside a VCA environment.
It is very exciting to have the SAP certification for VCA published.