I happen to be browsing some other game dev news last night and I came across this article from Facepunch Studios, the guys behind Garry's Mod and Rust.
They are rewriting Rust and using HTML 5 for the UI.
It seems as though they are embedding the chromium web browser into the engine:
Garry Newman is using Coherent UI in Rust, which is HTML5-based multi-platform user interface engine for games. There are already hundreds of projects using Coherent UI which proves the stability of HTML5-based plugin in game UI. You can check Planetary Annihilation by Uber Entertainment, which UI is 100% powered by Coherent.
What I did today, that may be of some interest for anybody else attempting this:
Investigated the Chromium Embedded Framework, a simple way to integrate Chromium in to any application.
CEF3 is provided as prebuilt binaries, but unfortunately not for VS2012. So I had to build my own.
Integrating CEF is a good alternative, especially for small projects. We've investigated it in a details and wrote an analysis on What should developers consider when using Chromium Embedded Framework (CEF) in their games? I would love to hear your feedback on it. Please find it here