I'm saying the chilling effect means you won't have an option at all. American content creators/web app makers aren't going to start with a global product; they simply don't have the capital to bootstrap something globally. They would normally stick to just an American market, but now they can't because the barriers to entry are now too high. So it dies in its infancy.
So yeah, creators in other parts of the world will be largely unaffected, but -- not to be xenophobic -- how much of the internet is created by Americans?
I don't know who you think will stop publishing content online, just because their website loads slower? Most websites aren't businesses, (I have about 8, none of which are) and as long as cheap/free hosting (e.g. outside the US) still exists, Americans will continue to publish blogs and hobby sites, even not-for-profits like wikipedia will still work. It'll load slower in the US, but it will still exist (and, if they host it outside the US, the global community will still be able to contibute normally - unless I've misunderstood IP routing, which is not a subject I know very much about.)
So yeah, creators in other parts of the world will be largely unaffected, but -- not to be xenophobic -- how much of the internet is created by Americans?