This is a nice way to deal with building lists of objects to display in tables. It’s kind of hidden in there, but in your serializer, you can specify that a field is represented by another serializer.
The result is a list of objects instead of a list of URLs or PKs.
Now, going with that, you can save on data transfer by serializing only a few fields.
What you do is copy the related object’s serializer, and delete fields until you get a limited peek into the object. You might also want to add the URL fields with the HyperlinkedIdentityField class.