You should now have an understanding on what RADOS classes are and how they can be used to speed up processing by moving tasks directly to OSD. From building simple classes via Lua to developing classes in the Ceph source tree via C++, you should now have the knowledge to build a RADOS class for whatever problem you are trying to solve. By building on this concept, there is nothing stopping you from building a larger application that can take advantage of the scale-out nature of a Ceph cluster to provide large amounts of storage and compute resource.
For more examples of how to use RADOS object classes, please consult the hello object class in the Ceph source tree found at https://github.com/ceph/ceph/blob/master/src/cls/hello/cls_hello.cc.