Author here, thanks for the feedback. This is v. much a work-in-progress, I'm in the process of trying to build something non-trivial with it. Just a couple of things to address in general from the comments so far:

- I'm aware of dhall, jsonnet and friends, I think they're cool, but I think the most important for me is this is just js - that means nothing new to learn + you can use it from front end code + free linters etc.

- I think the to-html bit is important, this is something I tangentially talked about in more detail here - https://leontrolski.github.io/dom-syntax.html. There was some discussion on hacker news about that one too, again, I think the important "feature" is that it's just js. Again, to me that's really important, so hiccup, jsx, etc don't cut it.