One could loosely associate the metaphor of hypervisor (I know what you mean, I work with virtual machines every day) with NPMR. The NPMR VR is a superset of our PMR and other PMR's.
This picture may help you, although you are not at this point in the book:http://books.google.ca/books?id=RYHtBPi ... &q&f=false
Looking at that diagram, you could sort of say NPMR is like the parent partition in Microsoft Hyper-V. But there would still be another layer above (below) that representing the hypervisor.
In Hyper-V, there are three possible types of partitions: the root partition, the parent partition and the child partition.
The root partition is the original partition. It starts the hypervisor. The parent partition can call the hypervisor and request the creation of new child partitions. Virtualized operating systems (guest OS) and applications run in child partitions. There can be only one parent partition on a given machine but there can be as many child partitions as computing resources will support.
Where my analogy fails though, is that each NPMR would represent a separate computer.