Can't wait for a more technical explanation of how this would actually work.
But in the meantime... I'm confused...
I have trouble understanding what "Once this tiny code is inserted into the core code of any blockchain, that’s it." actually means. To me this sounds like you will negotiate with each DEV team to include code that would essentially connect to the ARK blockchain and capture these transactions. This doesn't sound tiny to me. And I'm not sure if the devs from other (at least major) coins would be willing to do this.
On the other hand you mention Encoded Listeners, which to me sound like multi-chain relay nodes that could capture SmartBridge transactions on the ARK chain and then perform a transaction on another chain. This makes more sense and you can make them compatible yourselves. It does sound like a ton of work + the maintenance to keep it compatible with new versions.
Hope someone from the dev team can clarify.
ARK is comparing itself to COSMOS, and with cosmos you dont need this tiny code insertion for any block chain and thats a big difference between the two.