2.) YouTube
I loved the PS4 because of how easy it was to live stream games on Twitch and Ustream. However, not everyone likes to share their games live. Some people like to edit their footage and upload it later. That's where YouTube comes into play since that's where all the Let's Play videos are at. It would certainly be cool if you could upload recorded footage online to other than Facebook.
I was told that Sony is currently working on an app for the next-generation console. It's no surprise considering there was an app available on the PS3. Let's just hope they implement this sooner!