Given the arguments in the article: Isn't Node.js rather the new RubyOnRails ? Rails had similar hype patterns and unclear long term usecases when they launched the blog video. (imho)
Also from the article: You'll not have headaches regarding concurrency (at first), but you'll have them when dealing with callbacks. For some cases I almost ended up with one callback per line, that's crazy!
People that write stuff like that are very ignorant and are probably trying to write Javascript like they write their Java.
Just because you say something doesn't make it true. I found nothing in the article really linking the two other both being used for "web stuff". Everything else was either a design choice or still being evolved (nothing is magically perfect on day one).
PHP did something great for web development in a time when most people just wrote static sites. Node.js did something great by allowing people to write high concurrent/websocket apps with ease (or at least bringing this to their attention).
Don't worry, I think the lack of the sort of standard library you would find in PHP or Ruby would keep people from considering using Node for "everything." ;)