- it focuses on resources
- it uses JCR as backend API (see jackrabbit as implementation)
- it adds a thin layer of REST over JCR
- it uses OSGI and its plugin-mechanism for more heavyweight and/or integration stuff
In a sense, it is like learning a new programming language: it opens your horizons, and questions some established thought routines.
Go ahead and check it out, it might trickle in...