How does Project Anywhere have any relevance to the point being discussed here? It does not run on WASM, it is not performance sensitive, it doesn't really "run" on browser.
Although I do see a future of Gaming on browser. Not everything has to be AAA 3D Games. I want retro 2D Games. Games that were even possible with good old Flash.
Have you actually tried it? I haven't seen a link to try it.
We built https://ayvri.com, and we use WASM extensively (though the public site is using cesium, we've also built our own renderer which is not public).
Also, the original blog isn't only about WASM, that's just one of the technologies making this sort of thing possible.
Canva was built pre-WASM, so photoshop in the borwser, may be better with WASM, but I'd suggest it isn't a requirement.
"The technology can never compete", but it gets better every year.
The new Microsoft Flight Simulator is amazing, and they took that same rendering and can stream it to the browser (though not as a game as far as I understand) with Project Anywhere https://developer.nvidia.com/blog/streaming-simulation-and-t...
I'm not saying that WebGL is ready to take on AAA games today, but calling it "pure fantasy" is naive. People will never use a browser on their phones, the internet will never compete with television, electric cars can't take on gasoline, the list goes on and on.