Sony released a new video detailing some the features for the new PS4 Interface. With all the games shown, online requirements and used game DRM talked about, honestly this is what I am looking forward to most on the PS4. Sony seems to have learned from the past 6 years with the PS3 and built a better ecosystem for the PS4. The video shows of some great features such as notification for what trophies your friends have earned, recording and sharing videos, cross game chat, being able to download single and multiplier portions of a game separately and more. The best part is that all these features are possible without having to interrupt your game.
Look forward to the PS4 launching sometime is Holiday.