Microsoft's ReactXP uses one codebase for IOS, Android, WindowsPhone and Windows, so if they can come up with an app generator that uses that (for example) then that is the future of Clarion in a nutshell.
I agree with Z that mobile development has been a nightmare in choosing the right platform because there is something new every week. The problem with React Native is that there are still too many options with libraries, UI and plugin options etc to choose from, so choosing the right combination still won't be easy.
Nativescript seems similar to ReactNative but with a more singular focus, ditto with Ionic which has very good documentation and support, but is a hybrid development tool rather than a "native" app generator. (ReactNative and Nativescript don't actually generate "native" code, they generate js applications that are served to a native device via a bridge that can be a bottleneck to "native" performance)
I'm sure H5 has been a good learning experience for Diego, but the commercial opportunities for Clarion are much greater if they can come up with an app generator for all platforms.
To me the JSON generator he mentioned is just a sideshow for current Clarion developers, I personally can't see a great need for it as an alternative to existing Clarion methods for handling JSON data.