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Re: "some of these will surely turn out to be revolutionary eventually" -- It may be true, but the real question is do YOU want to be the guinea pig to test them. Unless your job or shop is R&D, it's usually best to let other companies kick the tires; get the kinks out; and most importantly, test it for your particular domain.

Domain-mismatch is a common problem: something is expanding rapidly, but in the end doesn't work on many or most niches. One size does NOT fit all.

An example is the no-sql movement. People started writing ALL new applications with it, thinking "it's the future". Turns out the regular RDBMS are still the better option 98%+ of the time. "Microservices" are a similar boondoggle. Make sure you really need it.