Comments with progress timestamps (in e.g. XBMC)
When you are watching something and you see a specific scene, it could be neat to have the ability to post a comment for that specific time in video.
Comment: "Best quote ever! owned!"
Interesting idea, will have to see if/how something like that can be done. It’s mostly going to be up to the media center or mobile app, who would need to send the timestamp.