Just imagine it's 1893 and no one can see how big cars are going to be. Well this gizmo XYZ is just like cars were then! You'll wanna get in on this now! And so this gets internalized and repeated to friends and family regardless of objective merit. Because it sounds "truthy".
The parallels between blockchain and the Internet are similarly contrived. They are different phenomenon and the line "X is like Y thus what happened to X will happen to Y" doesn't have objective merit in this case near as I can tell. (Apologies to the half a dozen or more posters who have probably posted something to this effect on the thread).
The _potential_ uses for blockchain are much more limited than potential uses for the Internet for instance. (And there are a number of other differences).
That being said I have no doubt there are uses for blockchain technology. Making people rich with cryptocurrency for one. And hey, I'm all in favor. Let's just don't get carried away with the parallels.