I'm not an economist or specialist, but if I were to guess where the tech[1] world is moving towards, I'd look at established and mature industries like automobile manufacturing and trading. Or, to stay in the trade of intangibles (that is, services), Finance. I don't think there will be 3 or 4 internets, I believe that little by little each country will have its own internet and barriers to connection similar to how goods/services flow today: sometimes freely, sometimes not. This brings huge implications to current assumptions of growth for tech companies.
At the same time I believe certain standards will be built, and agreements made, that will allow what we understand as the Internet today to exist between some or many jurisdictions, just like there are places where you can easily import cars or consume international financial services. In other words, I don't see Americans being blocked from reading Euro blogs or something like that.
In the non tech world, roughly speaking, we went from protectionism to (varying degrees of) free trade, while in the tech world we will go from free trade to (varying degrees of) free trade. A leveling of expectations, if you will.
[1] When I say tech I mean mostly sv-like internet-based companies. Hardware always followed the same pattern as everything else, with some changes in the near future due to concerns about backdoors and privacy.