I'd say VNC is a low priority as you can simply ssh over VPN from your Android device
Unless you're trying to watch a KVM machine boot up when someone's called you to say (for example) the Windows server has stopped working.
That said, I agree the ability to create new VMs, etc would be far more useful. Although if you create a new VM and then discover it doesn't have SSH or similar, you're stuck again without the VNC.