That being said, it seems like the ultimate end run around otherwise well established law surrounding books. As you noted essentially all software works in this way. Throwing out all established laws and end user rights "because digital" hardly seems reasonable to me.

How does such a line of argument square with the fact that even making personal use of a digital item inevitably involves multiple copy operations on a local device in the best case? Even moving it between two partitions on the same device involves copying it. (I suppose I should just be grateful that the digital overlords saw fit to grant me permission to move things between logical volumes. /s)