On the technical side of things, it looks like its an old battle replayed with older weapons, just to get go through the same path of HTML. "Oh, but we will not put more features". Ok, but people wont use it then because they can also serve text, markdown, etc... and can chill out, because they know if later they need to serve images, videos or graphics, they can do it with HTML.
And i say this as a person who is also trying to create some alternatives to the web. But instead of going back to the nineties, i tried to think how the technology of 10 years ahead would look like. I've probably not maded it because its really hard to push the envelop when things are almost in the state of the art as Web is. But i also don't think the answer for the future will be in the past.
You know what i think would be a really badass movement. To create a simple spec of the Web, even without Javascript. Because with "feature creep" Google through Chrome is making impossible for others players to create competing browser engines.
So if two folks decide that they will create a web engine in this new language they like, it wont be an impossible goal. Because there's this simple version of the spec, with much less features.
The people behind this might be very good at convincing people and real believers, this thing can float for some time working real hard for this.. But it will be really hard to get this out of a small niche.
Anyway i love the thinking behind this. The meditation, the koan, is really on the right track. We need more rebels and fighters on this front. But i just can see it, how this can compete as a subset of a massively popular and deployed protocol with clients everywhere? How can it really differentiate itself, apart from what the web today already can serve to people?