I wish I had more information on how exactly it would work. There are other decentralized platforms like the newly created DDREX, Oasis Dex, BitShares and the best of all EtherDelta. Most use ETH-based technologies or it's a 0x layer.
Binance saying that the future lies in creating, and strengthen, the communities is very interesting. But is it still possible to put so many different assets and still provide statistical information while maintaining anonymity?
And we still need a middle man between fiat and the world of cryptocurrency. I hope there are people working to solve this problem as well.
Without developing their own chain I would imagine it would be similar to OpenLedger on the BitShares exchange. All of OpenLedgers markets run on the BitShares blockchain while they collect the trading fees. Users maintain control of all their funds/keys. They are also able to charge exchanging open.BTC > BTC and vice versa.