A feature for us to print the number of items in a collection, wherever we want in a collection list, a collection page, or static page.
It could be useful to design bubbles or indicators showing how many items exist for a given list. It's more precise than for a collection. It would be affected by the limitations of a list.
For example a list of 3 first blog posts filtered to category: international, with an indicator in the title of the list showing how many items that list returns when you click a "Show all" link.
I don't fully envision how this would work because this indicator would have to be outside of the list, actually, along with the title of the list. It's not a dynamic data per se, rather a metric from the CMS.
It goes along the pagination feature and maybe the manual sorting of a collection: