Kindles could be pretty good for pubs only, plus they're a lot cheaper. But I'd assume they're a lot harder to program stuff for. I think this is where a lot of people are missing the huge potential of the iPad. WE (the aircrew) could create whatever we feel like we need for the mission. There are a lot of smart, creative people in the AF that have to rely on contractors to make shitty computer programs that cost millions, both on the ground and in the air. Even if one of us wrote the world's best PC program, good luck getting the comm squadron to install it on a computer. If it's not a spreadsheet it won't happen.
There's a lot of potential things the iPad could quickly and easily calculate while airborne: moving maps (or charts), killbox coordinates, divert fuel, frag fuel, a NEAREST function, ETPs, TOLD (heaven forbid), weight & balance, 781s, MARs, etc. None of which my current aircraft can do on its own. Sad but true.
Someone has reportedly already found a workable mounting bracket for my aircraft that installs without screws. Either way would work, though I could see my arm always hitting the kneeboard and changing the screen at just the wrong time.
There is an idea for separate "Secret" iPads with wifi disabled and the requisite stickers. Heavy guys would need them in the desert but not really anywhere else.
Current pubs bags do not (usually) include porn. iPad could possibly. Case closed.