I do not agree that node.js revolutionized the company and everyone should start using node.js everywhere. Rather a better approach is what suggested by Nicholas -
http://www.nczonline.net/blog/2013/10/07/node-js-and-the-new...
Also, maybe you misunderstand what we are doing. We are using nodejs for the web app layer. But it could be used for services (like Walmart Labs is doing). You really have to determine the context, the people, the technology, the amount of risk, and so on to decide.
But I do agree, no one should see nodejs as a silver bullet.