While I suspect that in the long run blockchains will absolutely end up finding some niches where they're persistently used, I do agree that a lot of the broader claims remind me a lot of "next year will be the year of linux on the desktop".
Fast forward to 2018, and we have Windows Subsystem for Linux, and a very popular BSD in silver aluminum cases made by a fruit company, dominate the desktop market. You could say that the year of linux on desktop is today (in some perverse modified form, but nonetheless).
That's actually a really good point (especially if one includes Android) - but "20 years later than we hoped, in a completely different form than expected" is significantly what I was trying to handwave at.