As long as they don't get rid of the Qt dependency the project is a bit pointless. If you are using Qt anyways Qt Webview offers already a superior way to render HTML than Ladybird.
Qt webview is just Chromium in a trenchcoat. The point is to create a new browser engine, not a new Chromium UI (and hopefully much less bloated than Chromium).
I think the point is the opposite; they have decided to build a new "web stack" from scratch, not just build a new "browser" (or invent a new GUI framework). Hopefully the web engine is not deeply tied to Qt, but you need something in order to draw an interactive window. The article mentions that they will also use existing libraries for things like font rendering. Seems like a pragmatic decision to me.
