A key benefit of Node is its streams architecture and patterns. Similar to Unix pipelines, Node streams allow processing lots of data without having to buffer it all into memory at once.
Node.js is well-suited for streaming out large templates which you would rather not buffer into memory all at once (for example, if they are very large, or if you have many connections, so you want a low memory footprint for each connection).
I am not familiar with these, but a quick search for streaming template engines reveals:
Whether it is worthwhile depends on your application.