It would be a nice feature request to copy data (selectable, not all) to another host (which is assigned to the same template of course, or at least items with the same key). This would be really useful for us for example for bandwidth statistics if a customer migrate from one switch to another (as examples).
For host prototypes it would be a nice option to have a possibility to convert them to actual hosts in a simple matter, transferring all created entities on them.