It loosely refers to decentralized applications that have some form of protocol level way to incentivize users. This is often blockchain related, but not always (Urbit isn't except for its IDs).
That interview should give you some idea, the space is very young but the tech is interesting.
I took it to mean something about use of blockchain, especially but not limited to Ethereum, and "smart contracts", to create a new kind of distributed app platform. But I am not sure that's right.