This is Windows 95, running in an Electron app. Yes, it’s the full thing.
Does it work?
Yes! Quite well, actually.
Does it run Doom (or my other favorite game)?
You’ll likely be better off with an actual virtualization app, but the short answer is yes. Thanks to @DisplacedGamers I can recommend that you switch to a resolution of 640x480 @ 256 colors before starting DOS games - just like in the good ol’ days.
Can it run in a container?
Of course! Currently this is only supported on Linux, simply install Docker on your distro of choice and run the following:
docker run -it -v /tmp/.X11-unix:/tmp/.X11-unix -e DISPLAY=unix$DISPLAY --device /dev/snd --name windows95 toolboc/windows95