There's a huge problem with calling sites like Twitter, Reddit, Facebook, and the rest utilities is that it implies there's no other means to communicate effectively on the web. The reality is that we have RSS, Atom, blogs, Bittorrent, and many other easy to use technologies for which anyone can share their content. It's not like these are hidden behind console commands on Linux as these are readily available for use via for-pay (and some free) providers. So, your argument doesn't hold in terms of the practical aspects of a utility who has a legal and material monopoly (the web cannot exclude other technologies and their adoptions like say the power grid can).
