This works almost exactly the same way that the MetadataAwareRemoteFactoryBean does, except that it doesn't generate a remote CFC, but instead generates a component in ColdSpring's bean cache which proxies the underlying object and can have AOP advices applied to it.
Just for a test case, I applied the same VOConverterAdvice to the AOP proxy. To test it, I don't have to use a web service as I did with the remote proxy. I will just call getBean('proxiedUserService') and then call getUser(). If the advice is working properly, the result will be the converted User structure instead of a User object:
This has the same possibilities as the MetadataAwareRemoteFactoryBean, for all the same reasons: your Advices can now act in a much more intelligent way and can change their behavior dynamically based on information supplied in the metadata configuration file.