Blockchain is the main key for the revolution now a days.
I dont think its blockchain that is revolution, bitcoin is. Without bitcoin blockchain is almost useless because who would put up database (blockchain) with need of securing it with computing power worth tens of millions of dollars at first to actually semi secure'ly use it? Noone.
To be fair, plenty of companies seem to see the blockchain's potential. I mean, it's probably not as good as most people here say, and it definitely doesn't solve anything like ICOs would have you believe, but it has niche applications that are unique to it. We haven't really seen any of it in practice yet though, so I guess it's alright to be skeptic.