You've known for years that the end is near for Facebook and yet facebook has been and is growing insanely. I am tempted to repeat jacquesm's comment about all os us dying above..
Don't discount the validity of that prediction simply because I did not put a time stamp on it.
Many people have said, and probably will say soon, that facebook will always be around and always be part of our lives and as integral to it as television. Those predictions are bad predictions, yet people argue them.
I did put some date based predictions in another comment above, what is your prediction?
I myself predicted that apps would be the demise of fb. I received so many invites that I couldn't keep up - and it was accelerating. But they solved that problem by taking apps off of peoples primary pages. App developers complained and some probably missed showing what kind of ninja they were, but looking at it now, it looks like they made the right decision. I wouldn't be surprised if they manage to fix current problems as well.