Suggestion: notifications

Case: my frind is playing in <game1>, I can see it on a right side in application. After 1 hour he change game to <game2>. Can developers will add this function that I can saw this notification, something like "your frind change game to <game2>". This is should be "one shot notification". I manually enable it by clicking on avatar of my frind(button looks like "notify when change game"). When notification is shown it automatically disables.