The demise of the blogosphere has been predicted, as Martin Weller comments in this blog post, Whither the Blogosphere?
. More importantly, he notes that blogs are probably not really dying, but the online options are growing:
What I think is happening is another example of technology succession. The blog was the primary colonizer for the barren landscape of online identity. The presence of this colonizer changed the environment, which made it more amenable to secondary colonizers, e.g. YouTube, Flickr, Slideshare, etc which relied on the blog to spread. This in turn made the environment even more friendly towards the social flow apps, which started out linking to blogs, but have gradually taken on their own life. This resulting ecosystem will vary for each of us - for the people above the third wave of colonization has taken over the dominance of the blog and forced it into a smaller ecological niche. For others, the blog is still dominant, but these other tools flourish around it.