Social networking sites of the future

Social networking has changed quite a bit these past few years, with new and old sites coming and going. So, what do you think the future of social networking sites will bring? I really feel that Facebook is going to become the ultimate home page for users, with the ability to search through Bing, and the ability to share and connect with friends is one thing, but Facebook is also purchasing up many companies that could potentially grow Facebook to a global juggernaut.

What do you think?