BM hinted at a new project called plasma in the last mumble which would allow Interoperability between chains. He had previously indicated that atomic cross chain transfers were really not feasible. Have they found a way to do it? Reading between the lines, this could potentially allow for users to deposit assets such as bitcoin directly on chain, backed 1:1 by real bitcoin on the bitcoin blockchain. If this is the case, then the implications could be huge. It can eliminate pain points for the user while retaining all the security of a provably solvent, consensus driven, decentralized exchange. Right now if a user wants to deposit btc, then they have to hope that another user is willing to short that btc into existence near market price and if they want to redeem btc, then they have to hope that someone is willing to buy existing bitbtc near market price. With plasma, the user can deposit btc backed by actual on-chain btc instead of btc collateralized by bts, eliminating the worry about margin maintenance and liquidity. This would allow a much more seamless user trading experience, at least among various blockchain assets. In other words, users would be able to trade pairs such as btc/eth while knowing that the assets are completely accounted for on the native chains.
Of course this would be impossible for assets such as fiat currencies and physical commodities such as gold, silver, and oil. The MPA markets are the best solution for trading these assets.
The foundation for the DEX has been built with DPOS. With plasma, barriers to adoption because of liquidity can be greatly reduced. We will have to wait and see exactly what plasma will do, but so far it looks to me like it could be a game-changer to help bootstrap the DEX.