If the US/other countries follow suit there will probably be a big unintended effect though: the diminishing of open web standards and Google getting final say about what will work on "the web" and what won't.
With Firefox diminishing, Safari is the last bastion against a Chromium-only web.
There are lots of Chromium forks, but they own the project, and I doubt even Microsoft would take on any significant divergence from the upstream code base, considering the development velocity.
I would predict (native) Chrome graining a very sizeable market share on iOS within five years, driven in part by web app developers being happy to finally just focus on Chrom(ium) and add "works best Chrome" banners.