The thing is, even if Europe doesn't follow there are big consequences for the world.
Let's say Net Neutrality is rejected. ISPs are forcing Netflix, a video company, to pay more royalties to them to get Netflix into the 'fast lane'. This is an added cost for Netflix, so where will it go? It will have to be passed onto the customers.
Do you think Netflix will target just their US customers and increase their subscription prices? Probably not. Instead, it's likely that Netflix (or other hypothetical company) will have to increase rates all over the world.