It'll be difficult to implement a cross-chain exchange that would gather massive adoption in the mainstream world. The Wrapped Bitcoin solution is not 100% decentralized. But at least, it's a workaround for those looking to gain all of the benefits of Ethereum-based assets by just using their Bitcoin holdings. This is still an emerging industry that's not mature for the public yet. Developers are working hard to ensure people can participate in the decentralized economy without the need to interact with a middleman ever. Once full decentralization is achieved, centralized exchanges will have little to no impact over the prominence of the crypto/Blockchain industry. It'll be practically impossible to take down crypto once everything (from creating a wallet to trading cryptocurrencies across different blockchain networks in a decentralized manner) becomes completely decentralized. My guess is that governments will be going after developers to stop the revolution. Only time will tell us what will lie ahead with the future of crypto as governments devise new regulations in the mainstream world.
All in all, both the COMIT Network and the TenX protocol seem to be quite promising for exchanging crypto assets in a cross-chain manner. They're still experimental and not ready for mainstream use yet. But once a stable version is rolled out, things could get kicking in the crypto/Blockchain space. My guess is that new cross-chain exchanges using the aforementioned protocols, will challenge traditional centralized exchanges and even ordinary decentralized exchanges. Universal compatibility (interoperability) is essential for widespread adoption of Blockchain tech in the mainstream world. With how fast crypto is evolving, it shouldn't be long enough before centralized dominance becomes a thing of the past. Just my thoughts