If you are a student of history, you start seeing these things. I was in tech in 1995, and at the start of the Internet boom it was not obvious to everyone what was happening. You should read Bill Gate's "The road ahead". He (and many others) predicted things like Netflix and the information super highway but they got the delivery mechanism dead wrong - people were convinced it was going to be over cable TV networks.
I've heard similar things about the boom/bust days of Commodore in the mid-80s.
I agree with the general thesis that (a) people are searching for the next big thing, and (b) we'll likely get it wrong a few times.