Use case or problem
A general visitor of a published site has no way of seeing if there is a recent revision, improvement or newly added files in the site. This is especially a problem in sites with large amount of content.
Proposed solution
A way to visually discriminate newly added (or modified) files and folders since last visit. Probably a different font color would be enough. This can be an optional choice made by the publisher of the as not every site owner may wish to use this feature.