The framework could evolve in many ways. However, since the project is not yet funded, my time dedicated to Silicon is limited to only few days per month so features are added at a pretty slow speed. If you find this project useful, you are welcome to contribute. The core of the framework is now complete but there is room for new middlewares and new backends.
New middlewares could be access to external webservices, database drivers, logging, oauth, ... You can read more about middlewares here.
New backends are also welcome. They could add support for other protocols like HTTP/2, bluetooth, UDP, ... There is a small introduction to backends here