Look again :-)
In the examples it is the session beans that implement business interfaces, some of which are annotated @Remote.
A session bean with a business interface marked as @Remote instead of @Local can be accessed from outside the JVM.
The container will not do anything special for an entity bean implementing an interface tagged as @Remote. The entity beans in the tutorial are Serializable so that they can be detached and sent across the network in the examples.
Entity beans cannot be accessed remotely.