A few months back Doc wrote about a tipping point coming in the move from traditional print publishing to digital publishing. From the comments the entry received, Doc was surprised that the term "print to digital" can mean different things to different people.
Publisher's refer to shifting from print to digital as the process of moving from a physical print edition to a digital one.
But printers often refer to the shift of print to digital as the process of moving away from offset (and other traditional forms) of printing to the use of toner-based or inkjet "digital" printing methods.
Either way, you can argue that we're moving rapidly to the digital end of the spectrum. Publishers are producing more and more digital editions (especially in the iPad era) and printers are moving quickly to "digital" forms of printing in the way of inkjet and toner technology.
So whatever your definition, embrace your inner digital child and go with the flow. I mean, why fight the inevitable?