My $0.02 worth
Nowhere in the legs, regs or sups does it stipulate (or even imply) that you must have a paper version of anything. What you are required to have is the up-to-date version of the DAPS etc.
This is no prohibition on whether that version could be on an iPad.
Where this potentially runs into issues is CASA's question of what you are going to do if the electrons run out (or such similar). This is the crux of the issue that the FAA has been grappling with, can the iPad be certified as an EFB (i.e. can it stand alone)?
Perversely, there is also more likely to be a problem with VFR as you can't scribble on the chart and make all those funny pencil marks!
For what little it is worth, my opinion is that an iPad would meet both the letter and spirit of the law. In practice I would carry a backup; potentially this could also be electronic (I.e. An iPhone).