I vote for this. When starting to prepare QlikSense for our enterprise I just assumed this was a feature. Easy snapshots are of course great, but updating "state of the world" requires quite a lot of clicks which could be avoided by such feature.
Basically I want to iterate over one template on how to best address figures and trends in running business. For a new period I want an easy way to scope of data (new month), see all graphs change, and change comments according to new findings or trends. This will make life a lot easier for those regularly reporting to higher management.
Without current data refresh on stories, customers and users choose others products for presentation. This feature could give a boost to stories utilization.