Social Media over the next 5 years

There's loads of Buzz around Social Media and to celebrate Mashable's 5th B'day they've been asking various experts to give their view on the next 5 years. Have a read.

http://mashable.com/2010/09/07/next-5-years-social-media/

Now there's nothing particularly Earth shattering in this over view from the mashable guys. It seems obvious to us that as social media networks, like Facebook, are adopted by the older masses they'll be rejected by the younger generation, who will inevitably move on to the next latest thing. After all who really wants to be hanging out in the same bar as their mum. In the next 5 years will we become more closed rather than open? Will social snobbery, privacy and fraud lead us to be more conservative, less trusting and more selective about who we let in to our various worlds?