Isn't a blog supposed to be personal? The mentioned sites aren't really blogs, so the article is irrelevant.
Blogs still matter when it comes to details that aren't discussed in the media. In my native language blog posts and forum discussions are among the top results and I often learn more and understand my country better from this content than from the PR-dominated media.
I am glad that some of the bloggers I read have started micro-blogging - I am not interested in reading what they ate for dinner last night.
I like traditional personal webpages.