It's neither a "big part" nor "in your face". There's a share button on the controller which allows you to share content, if you want to. The button is out of the way. Again, I think you are making a big deal about something that is fairly minor.
I do hope that it's not facebook only, but allow sharing of videos and images to Youtube and picassa (as you can with the PS3).
While this feature wasn't on the top of my wishlist, it certainly will make it easier to share footage and video from games, for those of us that occasionally enjoy doing so.
I think #Sony
showed off a lot of good stuff related to the PS4. Loads of memory which will make it a lot easier for developers to do great things on the device, as well as a powerful CPU and GPU. The integration with the PS Vita and smartphones also looks very interesting, as does the ability to buy a game online while at work, and have it delivered to the PS4 by the time you get home.
Add to that all the regular apps (netflix, amazon streaming services, crackle, etc) as well as some new ones, this certainly looks like a good upgrade to the #PS3
. Hopefully, they'll include a real web browser too, unlike that poc they got on the PS3.