Are Blogs As We Know Them Dead?

It seems a little pre-apocalyptic to suggest that blogs "as we know them" will soon vanish from the earth. Sure, FB, Twitter, etc. are gaining ground - but more by creating a need that people didn't know to exist previously rather than by pushing out blogs. The problem with a text-full blog is its lack of interactive elements, which FB, Twitter have capture nicely. Collaborative technology may be where it's at, but unique, well-reasoned blogs that contribute to the intellectual landscape can stay around with a strong following (think fivethirtyeight)...it just seems that nobody's particularly interested in reading a tome about your personal daily errands anymore when status updates will suffice.