Best parts of VMware's ESXi 5.5 free hypervisor rely on vCenter, which isn't free. Uh oh?

I tend to stick with technical articles and how to guides. But there's something else I've been worrying about for months now. How will VMware be handling the move toward vSphere 5.5 and eventually 6.0, where the vSphere Client will be entirely gone, completely replaced by the vSphere Web Client. That means you will have to have a VCSA (vCenter Server Appliance) to attach to, making VCSA is no lon