The article suggests a number of reasons why Microsoft should buy Twitter with the most pressing being that it has changed how people share information. In a different article, another author suggests why Apple won't buy Twitter. I don't think anyone should buy Twitter.
While I currently have a Twitter account and sometimes Twitter, I post identical info on Facebook, Others have applications that let them simultaneously post across all social networks. And that is my issue, duplication. For me, Facebook is the more preferable place to post and share links, photos, information, etc. The real question should be, who will buy Facebook. I believe Facebook has more revenue opportunities ahead of it than Twitter ever will. Thoughts.