the future of trading platforms is in more decentralization. the current existing exchanges are nearly obsolete and they don't match the decentralized nature of cryptocurrencies such as bitcoin. we need them to become more decentralized.
and it has already been started too. there are many projects (which sadly are not so popular) working on this goal right now. and i believe with side chains growing this year we may see a big growth in decentralized exchanges too because it makes things easier and more secure.