But the approach should work with all of those ~2000s simple 2D/light 3D Windows games, like Anno, C&C etc. that have less than 1GB of assets and no serious multithreading. Newer ones probably won't fit into a browser tab anymore or would take too long to load.

The biggest problem for the smartphone browser version is extensive use of left+right mouse input of that era which is naturally not a good fit for touchscreens.