[inportb]

I think WebCPU is where it's at. First class virtualization in the browser so you don't have to emulate :)

[mindcrime]

Why not? People are already running VM's and other OS's in the browser.

https://github.com/atrosinenko/qemujs

https://jamesfriend.com.au/pce-js/ibmpc-games/

https://leaningtech.com/webvm-server-less-x86-virtual-machin...

and so on...