That would be interesting! Currently there's no ARM variant of Chrome, and the Javascript engine (at least) relies x86, so a port would be challenging.

Chrome OS is just a browser, so any HTML5 capable browser should have access to the same apps that chrome does.

Chrome just makes it a bit easier to discover apps by way of the chrome web store, and Chrome OS forces users to operate exclusively on the web as the only accessible userland app is -- Chrome.