Fleksy, a third-party keyboard option, today released an SDK that allows developers to quickly add support for the keyboard in their app. Fleksy features gesture support and advanced predictive capabilities, though it has previously been limited to its own note-taking app. With this SDK, the keyboard could see wider adoption.
Ultimately, though, this feels like a hack. It would be great to see Apple add support for third-party keyboards, though that may never happen. At the very least, it would be nice to see Apple update its own keyboard with gestures and better predictive capabilities, though the actual tap-typing aspect of the iOS keyboard is still second to none.