Practically a large portion of the internet is physically located in North America or controlled by American companies so even if no other countries follow it's gonna have a major impact on the future of internet. Sweden already lost net neutrality years ago, despite protests from EU when the government decided to pay Facebook to build their data center in Luleå.
At least one ISP also allows free access to Facebook (LTE 80mbit/s) while all other sites are slowed down to 100kbit/s after all the data on your mobile plan has been consumed. Just like Vladimir says I've also seen people who are actually happy over this. I guess they simply don't understand the consequences.
Imagine if net neutrality where removed 10-15 years ago, then we would use Myspace because there's no other social media available, we would use Alta vista because there would be no other search engines. Internet Explorer would be the only browser, Linux probably wouldn't exist, or it would have a really small user base while most people wouldn't have much choice other than Microsoft (and/or possibly Apple) one of them could probably pay the ISP's to censor the others.