@philryuh has been asking for this feature for nearly a year now and it's finally here! If you hover your mouse over a user's profile avatar or username it'll show some quick details for them! You can follow them, start a direct message chat, and see their level!
What is a user's level you may be thinking. It's a bit underused but the data for the feature has been in the website for a long time (since the coin system was introduced) to have a way to indicate how much a user posts, comments, contributes to the wiki, and other things. Coins can be spent but levels can't so it'll always represent your contributions! You can see a little more info about it on your profile page.
Edit: I'm also now working on a preview hover for games!