I wish they went into more detail about how the rendering happens. Compiling Doom to WebAssembly via Emscripten and running it in your browser is great, but it has been done before countless times. Taking the output and plotting it as a time series in Grafana... that is incredible.
Yeah this could be anything from "wow cool" to "holy smokes, how is THAT possible???". If all of the game state, output pixels etc were turned into time series data and reassembled in a dashboard in real time--THAT is pretty cool!
being able to expose variables, edit them and see them update live, and maybe even rewind your game to retest different scenerios would be so helpful to many games.