Ad-ridden, privacy-destroying malware I'd imagine. Since that's all the "smartest people" in the biz are working on: getting people to click ads and subverting the web.
The Facebook Jr's out there won't like to hear it but that's the cold truth.
I was commenting on the revenue potential, not the ethics or quality of the product at the end of the process.
That said, I still love Google Search-- it's nigh magical how it shortens the distance between my brain and the answers it craves at any given moment. And I still watch youtube (yet another service that some said would never make money), even with the ads. And I still use Facebook to stay connected with friends while I travel the world for the next 6 months or so. I don't see any (present or future) privacy consequences with these services, and the ads hover right around the "tolerable" range.
You can take your pick here and see what's most important to you: http://pleasedeletefacebook.com/
The consequences range from enabling the surveillance state, data theft, NSA slurping, job loss, employer intrusion, bullying, lowering of credit scores, depression, stalking, jail.
These are some interesting ones to name a few:
http://www.npr.org/blogs/alltechconsidered/2013/07/03/198129...
http://money.cnn.com/2013/08/26/technology/social/facebook-c...
http://www.schneier.com/blog/archives/2013/06/finding_sociop...
http://yro.slashdot.org/story/12/07/13/1247257/facebook-scan...
> Doesn't take many of those for wholesale evacuation of Facebook, does it?
Sadly, I wouldn't bet on it.