> Presumably they'll eventually port Chrome to WASM. Then they can completely control the browsing experience.

...what? As opposed to shipping binary executables for an OS/arch combo, they'll ship a binary executable for WASM, and then a second binary executable for the OS?

If they want to take Chrome closed source and make it fully obfuscated, they can do that already, with or without WASM. Chrome is already closed-source, only Chromium is open -- and we know Chrome has secret sauce in it not from the repos.