The main purpose for my customers will be to have many clusters and single nodes distributed across Europe or the whole world in one GUI. This provides a rudimentary health overview and makes it easy to centrally manage VMs in different clusters/nodes.Ignoring bugs for the moment, what will it not do, that vcenter does?
It is also very important to have centralized rights management to determine which admin can access which clusters / nodes or VMs.
Cluster management and configuration of the nodes is still done individually.
Central patch management might also be a good idea, but this will certainly not be in the first version.