I hope they can pull this off, because my experience with Vim emulation plugins is they don't even come close to being Vim. Vim is so vast that everyone has their own way of using it, and what one person might consider an obscure feature could be essential for someone else (plus losing my .vimrc would be like losing an arm).

I wonder if it would be possible to run Vim itself in a browser using Emscripten or something?