Not as easy for graphically demanding games, but web browsers have been able to run a full VM in a browser for years now. Slap the game on it and call it a day: https://retroonline.net/Windows/Pharaoh%20%26%20Cleopatra

Now, please vibecode me a winxp directx driver that serializes calls to its wasm counterpart, to enable graphics acceleration for such VMs. Sounds highly doable: virgl, virtio-gpu and Venus exist. Might be even simpler to do it for Vulkan and port dxvk to XP.