I haven't seen any work from any browser implementers working towards host-bindings or GC. I just skimmed through the I/O talk, as well: AutoCAD was running in a 2D canvas through emscripten in a WebWorker, while the rest of the code was a custom-built React/TypeScript app. Hardly the desktop AutoCAD everyone is thinking of...
... and I didn't spot any mention of "WebAssembly 2.0", whatever that might mean...
... and I didn't spot any mention of "WebAssembly 2.0", whatever that might mean...