I like the electronic gadgets and if I could afford them I would have plenty.
On the other hand, sometimes it is easier just to check things in a book, especially if it is alphabetical.
I do love my gadgets, but for just reading I still prefer real books.
That said, I don’t think God cares if you swear on a digital Bible or a family heirloom Bible. A lying thief will gladly swear on a stack of Bibles and not mean a word of what he says. A true Christian knows exactly what he is swearing to and the words of the Bible matter, not its physical form. God knows what’s in our hearts.