I can’t say I know anything beyond the text in this new KB article , so don’t bother asking. See the Edit1 note below. This one is just for Storage Server 2012.
This update introduces a new feature for the OEM Appliance Out-Of Box Experience (OOBE) feature to support four-node failover cluster deployment in Windows Server 2012. This update also adds a wizard to create a domain controller on a Hyper-V virtual machine for using in a first-server environment. The wizard is added to support the Cluster-in-a-Box design.
Note Currently, the OEM Appliance OOBE feature supports only two-node failover cluster deployment.
It reads like it’s aimed at manufacturers for a set-up wizard.
A supported hotfix is available from Microsoft.
I got a clarification from the Failover Clustering group. This update is intended for Storage Server appliances. Everyone else: please ignore!