i think the main problem is that you need the fastest response times possible to attract daytraders. You can't really manage that with a decentralized system at the moment.
That is certainly true. But if this system could become improved, then it would definitely take over the centralized exchanges with far more better security and scalability. As Bitshares claims that it could be capable to handle lots of TPS, then I have no doubt that OpenLedger would be able to handle real time settlement.
It is only a matter of usage and most of all scalability, to help these systems grow and become used in the mainstream world. Just my opinion.
