You know, people complain about the Star Trek: TNG "one PADD, one document" thing, but I've never found it baffling. Yeah, of course they could have tabs, and they probably do. But multiple devices are a way to see multiple documents full-size at the same time, and certain commanding officers probably ask for multiple PADDs as a matter of course so they can spread them out and review them easily.
@noelle laughing about one padd one document is like laughing at a programmer who uses multiple screens, one to code, one to keep documentation up... Its practical and we do it now, so why wouldnt we do it with PADD