Am I too late to the party?
On the point - is NodeJS overrated - no. Is NodeJS overhyped - yes!
NodeJS is just a tool (so original, right!) and used properly can make great things. More and more big companies are using it. Node's merge with io.js was the best thing that can happen to the project. Writing Javascript on the front-end and back-end looked strange at first, but with time, developers found it's quite powerful (and cool). I have some concerns though about matureness, compatibility and maintainability. Mainly, because of Javascript's current "changing" state.
NodeJS will continue to gain momentum and popularity. It's on the right track. It will just take some time to be mature enough to be more widely used.