Evolution is probably the right word here although you seem to imply that you are actually asking what the next "revolution" could be looking like. The revolution took already place as that was the introduction of a currency successfully working on the principle of decentralization on a global scale across boarders. That wasn't possible due two the double spending problem.

So I guess the question would be whether there are new technologies in the pipeline that could successfully organize a currency or a whole ecosystem in a decentralized fashion? We are probably going to see various evolutionary steps when it comes to Bitcoin, but lots of it is probably going to happen on layers different from the Bitcoin base layer. In the long run Bitcoin might altogether go through lots of iterations, but with technological progress will probably also come some counter-regulation from governments if the technological advancements could undermine their urgent desire for mass surveillance, for example.