Maybe I'm dumb, but I don't see the requirement. Paper is easy, you can write on it, highlight it, they have a hundred copies of the things in Pubs, it fits in your bag. To me, it's easier to flip through a book, turn a page, highlight something I'm interested in looking at later, etc. Even on my Kindle, it's tough to flip through something and find something on a specific page, or a picture. Also, it's tough to look at a huge chart on a small screen unless you are already pretty familiar with the chart. Plus, like Brett said, the Navy isn't going to get rid of paper pubs. You'll still have to carry them as backups in case your battery dies, screen fails, coffee is spilled on it, etc. Nothing ever goes away in the military, shit just gets added on. Not to mention the fact that you'd be upgrading/changing the thing every 4-8 weeks, just like we do with paper pubs. I think it would be harder to upgrade 20 iPads than it would be to throw three boxes of pubs in the recycle bin and put new ones on the shelf. Paperless isn't always better, just ask the FDO's that have to deal with TIMS on a daily basis. As soon as it crashes or slows down they can't update the schedule, planes can't get issued, gradesheets can't be submitted. It's a clusterfuck.
CNATRA sent out a survey asking about the e-bookbag and what we thought about switching to e-FTIs and other stuff. I personally don't like it...again, I like to have pages to flip through, highlight, and study later rather than flipping through page by page on a screen.