In the latest issue of American Printer, a trade publication for the commercial printing industry, Steve Johnson pen's an article "The Holy Grail of Digital Printing" where he presents the difference between Digital Printing and Traditional Offset Printing:
1.) Whereas consistency is king in Traditional Offset Printing, every Digital Press has it's own, very different, color gamut. Color consistency in Digital Printing depends more on the characteristics of the image being produced and the machine it's being produced on.
2.) Traditional Offset Press productivity is some 20 times greater than digital printing, with much lower consumable costs. Digital press operations are plagued with downtime and calls to the copier repair technician.
In my opinion, the answer is simple, Productivity and Reliability will always win - your campaign will look like a campaign and your project will actually be delivered on time. Offset remains King!