Publishers need to move to all digital production methods with some urgency. Really!
Digital publishing requires a different Production perspective – Each title must start in digital form, be edited in digital form, stored in digital form, and output in a variety of digital market channel ready forms.
Digital Publishing requires a different Archiving perspective – Your content must be prepared for permanence with plans for updating as technology progresses. No more sticking a CD in some drawer.
Your digital content strategy cannot rely on outsourced conversion partners, PDF to ePub things, or as an after-thought to print. It's all changing too fast. Publishers must control their own digital content and have it ready for anything. It's not about creating an ePub. Its about being ready for the inevitable.
I am not saying that print publishing is going away, only that digital publishing is "upon us", is an fast evolving and changing business, needs a mindset change and the tools to match the mindset.
This post describes in relative detail the business advantages of moving to an all digital environment, in this case IGP:FLIP for a lot of content.