I keep thinking some update is going to modify the view to show the actual consumption of a zones resources in the project and/or zone view but neither does aside for the storage used. Aside from modeling a deployment is there a way to see this in the gui. When you test a templates placement it shows all of this detail but for some reason not in the gui. The columns for "Instances, Memory Limit, and CPU Limit" display what you've set and only the Storage Limit has the much more useful information showing both the limit and the amount consumed.
