[vbezhenar]

May be in the future web will be simpler?

My theory: browser of the future will need to support wasm and webgl (well, not webgl, but something similar, providing fast and safe interface for GPU). Of course along with smaller standards like fetch api, but that's manageable.

Most of the useful websites will utilize those tech to build their UI from scratch without using of HTML, CSS or JS.

And HTML, CSS and JS engines could be just another wasm blob. For example parts of chromium engine adapted and compiled for wasm. So it's like jQuery.

[PyroLagus]

That just sounds terrible for both SEO and accessibility.