Hamilton--The Great Schema of Things

PODI's PPML is focused tightly around building a single set of rules, if you will, that will make it possible to print variable-data documents on any digital printing system, whether it be an Indigo, Xeikon, Xerox or one of the new Nexpress systems developed by Heidelberg and Kodak.

As far as I can tell, IPP is an attempt to define a specification to enable the distribute-then-print model at an individual level within the enterprise. While this may eventually have serious ramifications for commercial printers, it's not even on the radar screen at this point.