Bit like the licensing per head of yore...
I remember the stink that got kicked up when they went from licensing per user to licensing per device, once PCs got cheap and people started having one or more each rather than sharing.
One of my larger customers doesn't like the idea at least; because of shift work they have a more than a few thousand devices that are shared and will require multiple licences per device instead of just the one. Will be interesting to see how they react.