I believe teens still use FB to both gain friends and direct them towards their other “cool” social media apps.
BTW, how did FB take the lead from MySpace? Could that give us hints on what would take the lead from FB ?
MyFace or SpaceBook, what will it be?
Yes. They just don’t talk about it as much anymore. The claims that teens don’t use Facebook seem to be based on reports that teenagers say it isn’t cool, rather than actual numbers.
Well, here are some actual numbers. From Pew Research Center.
Old people Facebook. Young people are using Instagram (already owned by Facebook), and Snapchat (just turned down a $3 Billion offer from Facebook), they will cave eventually when the price it right.
Facebook will age out, much like this message board has been doing for the last several years. Facebook is buying the new platforms that younger people are moving to, so they don’t really care about keeping all the users at FB, they will still have the users only on different sites.
Nice pictures as always, Janice. I have terminal brain cancer.
When my friend walks her dogs she says they’re “checking their p-mail.”
Yup, I think this is really the key. And I think that this dynamic has also driven the evolution of language itself – younger people wanting a differentiated group identity. If older people criticize them because the way they talk is “corrupting” the English language - that’s mission accomplished.
Since we all have no idea and are just throwing out theories anyways …
When we look at previous empires that have been overthrown, such as the ones listed in the OP, the “next big thing” didn’t offer additional functionality, it just offered the existing functionality in a better format. In fact, IIRC, I think MySpace had functionality Facebook didn’t have, but it wound up making for a less sleek, less intuitive, and less user-friendly format. AIM was edged out by messaging features within Facebook, Gmail, and just general texting on the phone, and the advantage there was you were already doing something else within the interface, and it was more convenient to just send messages through the same interface.
Thinking along those lines, there are a few options I can envision:
(1) A phone interface. Facebook is an app you have to download, but imagine if by exchanging phone numbers with a person, you had the option to view their photos, see status updates, etc. just by highlighting the number in your phone. And if you could set the privacy settings right on your phone, without going to a website or downloading anything. Phones are so ubiquitous that I could see something specifically designed for a handheld device overtaking something designed for a computer.
(2) A news site. Facebook used to be about people creating a profile explaining their interests, then became more about real-time photos and status updates, and I feel like right now it’s an awful lot about sharing news articles. If a news-based site could capitalize upon this, where the central feature is news (not just current events, but also really specific stuff, like new movie releases and award shows and sports and stuff) and communicating with friends is centered around that, I could see that succeeding.
(3) A shopping site. This is where I feel like another website could capitalize on something Facebook isn’t doing. Facebook has tried to create a Marketplace, and from what I can tell, it’s flopped. If some other website can come in and create a much better place where people can buy and sell their own stuff, and then also offer birthday reminders and event invitations and all that jazz, I think that could fill a niche.
So as I march inexorably toward the second incontinent phase of my life, I will come into my own in the social hierarchy. Excellent.
Pretty sure Instagram will take over and is taking over. As older people get more tech savvy they will migrate from Facebook over to Instagram to keep in touch with family and friends because pictures and videos.
The too-young-to-drive people in my house use Snapchat, Instagram and Music.ly
Dunno. Real Life, maybe? 
I’m there, almost every night, Baby! 
I came across a review of a group of enterprising teenagers who set up a 24/7 party-line telegraph system beginning in 1903: Amateur Number One: Party line telegraph.
It’ll be an amalgam of Myspace, Twitter, and Facebook.
MyTwitFace