Bottom line. PoW block is signed by a selected node (in a sort of PoS fashion) before accepted in the chain. The signing node can add transactions to the block. So instead of one miner, you have now two miners per block.

It's something to work around some of the Blockchain problems, but calling it "Blockchain 2.0" is IMHO a bit of a far fetch. And it is something to have the centralised signing node, run by the dev team, removed.