There is no question that DPOS offers one solution for scalability of cryptocurrencies yet there is a huge trade off for the potential of corruption in DPOS governance.

EOS' governance has taken governance to the extreme which has already resulted in one real fork in its short history.

We may see a DPOS coin acting as an open sourced Lightning Network yet no one with real money transfers, like oil producing nation states, are likely to feel it secure enough to use it as a currency of wealth. That will continue to be POW coins in my opinion.