Currently we can see what users who have access to our libraries are watching, as they are watching. I'd like to have the ability to see historically what all users who have access to my media are watching. I'm sure this is achievable through logs, however a friendly web-based expansion of the Now Playing is what I would like to see. It could be a simple list with the names of the users, a small thumbnail representing the content they viewed, the date and time they started, and if it was an encoding or direct play. A step further would be to show what level of encoding was used, based on the user's preference.
Weeks and weeks worth of this data will add up, so I suggest a left panel that would allow to filter by year, month, and day, with the filter options changing as more data is collected. For example, after using this feature for a few days, only the Days filters would be available. Additionally, an option to purge data that is older an X days or months would help to maintain the data set.