[gcv]

The Enlive system (for Clojure, see https://github.com/cgrand/enlive) does something very similar.

[draegtun]

Yes its nothing new. You can find lots of modules/libraries that have been around for quite that do same/similar things.

Here is a list which was put together & called "Push style template systems" which covers some of these modules/libraries (in different languages): http://www.perlmonks.org/?node_id=674225

[gregwebs]

There is also PURE for javascript already. http://beebole.com/pure/