This appears to be catering to the Hacker News crowd, where the LOL GIFS XD marketing tactic will likely backfire.
I don't think this is a serious project anyhow. They've basically just made it so that you can write JSON instead of HTML and given it a live reload feature. It has all the pain of HTML with the pain of having to convert that into JSON in your head added to it, with the only stated benefit being that you can live reload, just like you can already do with certain development servers for HTML and Javascript.